Transmitter and receiver

Abstract

To suppress an increase in circuit scale when a plurality of signals with different combinations of transmission parameters are multiplexed and transmitted using the TDM method in an SVD-MIMO transmission system.SOLUTION: A transmitting device 1 inputs multiple pieces of transmission data SD-1, ..., SD-N with different combinations of transmission parameters. Transmission processing units 10-1, ..., 10-N each perform error correction encoding and temporal interleaving processing and modulation transmission processing on the corresponding transmission data SD at a corresponding coding rate P1, time interleaving length P2, and number of modulation bits P3. A multiplexing unit 14 performs TDM multiplexing on a plurality of signals after the transmission processing, and a transmission weight multiplication unit 15 multiplies the multiplexed signal by a transmission weight SW. A UL frame configuration unit 16 modulates the multiplexed signal after the multiplication to configure a UL frame, and transmits a transmission signal S of the UL frame using the MIMO method.SELECTED DRAWING: Figure 1

Description

【Technical Field】 【0001】 The present invention relates to a transmission device and a reception device used in a transmission system of the SVD-MIMO (Singular Value Decomposition-Multiple-Input Multiple-Output) method. 【Background Art】 【0002】 Conventionally, a wireless transmission device for program material transmission is called an FPU (Field Pickup Unit) and has become an important device for transmitting video from a relay site or a news gathering location to a broadcasting station. In particular, in relays of long-distance races such as marathons and Ekiden, the FPU is essential for transmitting video and audio from a moving relay vehicle. 【0003】 As a transmission method of the FPU, studies on the TDD-SVD-MIMO (Time Division Duplex-Singular Value Decomposition-Multiple-Input Multiple-Output) method have been advanced (see, for example, Patent Document 1 and Non-Patent Document 1). 【0004】 In communication of the TDD method, UL (Up Link) transmission from a mobile station to a base station and DL (Down Link) transmission from the base station to the mobile station are alternately performed. The transmission units at this time are called UL frames and DL frames, respectively. 【0005】 FIG. 8 is a diagram for explaining a configuration example of a UL frame. The horizontal axis indicates time, and the vertical axis indicates frequency. The UL frame transmitted from the mobile station to the base station is composed of a plurality of OFDM symbols. In this example, 1 UL frame is composed of 4 OFDM symbols. 【0006】 On the other hand, MIMO technology is a technology for expanding the transmission capacity by using a plurality of transmission antennas and a plurality of reception antennas. 【0007】 (SVD-MIMO method) Figure 9 is a diagram illustrating the schematic of MIMO transmission using the SVD-MIMO method. This transmission system consists of a transmitter 101, which is a wireless transmission device of a mobile station equipped with multiple transmitting antennas 104, and a receiver 102, which is a wireless transmission device of a base station equipped with multiple receiving antennas 105. Through this transmission system, MIMO transmission using the SVD-MIMO method is realized, and multiple independent virtual transmission paths 103 are formed. 【0008】 In the SVD-MIMO system, the receiver 102 determines the transmit weight SW and receive weight RW from the channel matrix using a method called singular value decomposition, feeds back the transmit weight SW to the transmitter 101, the transmitter 101 multiplies the transmit signal by the transmit weight and sends the UL frame to the receiver 102, and the receiver 102 multiplies the received UL frame by the receive weight. 【0009】 This allows for the formation of multiple independent virtual transmission paths 103 in space, thereby expanding transmission capacity. For further details on the SVD-MIMO method, please refer to Non-Patent Document 1. 【0010】 In the transmission system shown in Figure 9, the transmit weight SW and receive weight RW change in response to changes in the propagation environment. Therefore, the receiver 102 needs to update the transmit weight SW and receive weight RW each time it receives a UL frame. 【0011】 Figure 10 illustrates the transmission and reception flow of the transmit weight SW. The mobile station's transmitter 101 transmits a UL frame (step S901). The base station's receiver 102 receives the UL frame and determines the next transmit weight SW and receive weight RW (step S902), and holds the receive weight RW. 【0012】 The receiver 102 feeds back the transmit weight SW in a DL frame (step S903). Then, the transmitter 101 acquires the transmit weight SW in a DL frame (step S904). 【0013】 The transmitter 101 multiplies the transmission signal to be transmitted next by the transmission weight SW and transmits the UL frame in the same manner as in step S901 (step S905). The receiver 102 then receives the UL frame, multiplies the received signal of the UL frame by the held reception weight RW (step S906), and performs the same processing as in step S902. 【0014】 By updating the transmit weight SW and receive weight RW for each UL frame in this way, stable MIMO transmission can be achieved. 【0015】 (Conventional SVD-MIMO transmission system) Figure 11 shows an example configuration of a conventional SVD-MIMO transmission system. This transmission system comprises a mobile station transmitter 101 and a base station receiver 102. 【0016】 The transmitting device 101 includes an error correction coding unit 111, a time interleaving processing unit 112, a modulation unit 113, a transmission weight multiplication unit 114, and an UL frame constructor 115. 【0017】 The transmitting device 101 receives transmission data SD such as a video signal or IP signal, performs error correction coding using coding rate P1, time interleaving processing using time interleaving length P2, modulation using a predetermined modulation scheme with modulation bit count P3, transmission weight multiplication using transmission weight SW, and constructs an UL frame, and then transmits the transmission signal S of the UL frame. 【0018】 The receiving device 102 includes a UL frame analysis unit 121, a received weight multiplication unit 122, a demodulation unit 123, a time deinterleaving processing unit 124, and an error correction decoding unit 125. 【0019】 The receiving device 102 receives the received signal R of the UL frame corresponding to the transmitted signal S of the UL frame, performs analysis of the UL frame, receives weight multiplication by the received weight RW, demodulates using a predetermined modulation scheme with modulation bit count P3, performs time deinterleaving processing with time interleaving length P2, performs error correction decoding with coding rate P1, and outputs the received data RD. 【0020】 The coding rate P1, time interleave length P2, and modulation bit count P3 are preset by the operators (users) of the transmitter 101 and receiver 102. The transmit weight SW used by the transmit weight multiplier 114 of the transmitter 101 is determined and fed back by the receiver 102. The receive weight RW used by the receive weight multiplier 122 of the receiver 102 is determined by the receiver 102. The coding rate P1, time interleave length P2, modulation bit count P3, transmit weight SW, and receive weight RW are transmission parameters. 【0021】 By setting these transmission parameters to appropriate values, desired communication quality, such as high capacity and low latency, can be achieved. For example, by setting the modulation bit depth P3 to a larger value, the transmission capacity can be increased. Also, by setting the time interleave length P2 to a shorter time, the transmission delay can be reduced. 【0022】 (Simultaneous transmission of multiple signals with different communication quality) Here, we consider a scenario in an SVD-MIMO transmission system where multiple signals with different communication qualities are transmitted simultaneously. Multiple signals with different communication qualities refer to signals that require different communication qualities, such as when transmission data SD-1 requires high-capacity transmission and transmission data SD-2 requires low-latency transmission. 【0023】 Based on the conventional SVD-MIMO transmission system shown in Figure 11, if we consider the case where two signals with different communication qualities are transmitted simultaneously, two methods can be considered: using two SVD-MIMO transmission systems as shown in Figure 12 (the first method), and using one SVD-MIMO transmission system that implements the TDM (Time Division Multiplexing) method as shown in Figure 14 (the second method). 【0024】 Figure 12 shows an example configuration for transmitting two signals using two SVD-MIMO transmission systems in the prior art, illustrating the first method described above. This transmission system is comprised of mobile station transmitters 101-1 and 101-2 and base station receivers 102-1 and 102-2, and consists of two sets of the transmitters 101 and receivers 102 shown in Figure 11. Receiver 102-1 corresponds to transmitter 101-1, and receiver 102-2 corresponds to transmitter 101-2. 【0025】 The transmitting device 101-1 receives the transmission data SD-1 to be transmitted at a first communication quality and transmits the UL frame transmission signal S-1 to the receiving device 102-1. The transmitting device 101-1 includes an error correction coding unit 111-1 using a coding rate P1-1, a time interleaving processing unit 112-1 using a time interleaving length P2-1, a modulation unit 113-1 using a modulation bit count P3-1, a transmission weight multiplication unit 114-1 using a transmission weight SW-1, and a UL frame constructor 115-1. 【0026】 The receiving device 102-1 receives the received signal R-1 of the UL frame corresponding to the transmission signal S-1 of the UL frame, and outputs the received data RD-1 corresponding to the transmission data SD-1 for which transmission is desired at the first communication quality. The receiving device 102-1 includes a UL frame analysis unit 121-1, a reception weight multiplication unit 122-1 that uses the reception weight RW-1, a demodulation unit 123-1 that uses the modulation bit number P3-1, a time de-interleaving processing unit 124-1 that uses the time interleaving length P2-1, and an error correction decoding unit 125-1 that uses the coding rate P1-1. 【0027】 The transmitting device 101-2 inputs the transmission data SD-2 for which transmission is desired at the second communication quality, and transmits the transmission signal S-2 of the UL frame to the receiving device 102-2. The transmitting device 101-2 includes an error correction coding unit 111-2 that uses the coding rate P1-2, a time interleaving processing unit 112-2 that uses the time interleaving length P2-2, a modulation unit 113-2 that uses the modulation bit number P3-2, a transmission weight multiplication unit 114-2 that uses the transmission weight SW-2, and a UL frame configuration unit 115-2. 【0028】 The receiving device 102-2 receives the received signal R-2 of the UL frame corresponding to the transmission signal S-2 of the UL frame, and outputs the received data RD-2 corresponding to the transmission data SD-2 for which transmission is desired at the second communication quality. The receiving device 102-2 includes a UL frame analysis unit 121-2, a reception weight multiplication unit 122-2 that uses the reception weight RW-2, a demodulation unit 123-2 that uses the modulation bit number P3-2, a time de-interleaving processing unit 124-2 that uses the time interleaving length P2-2, and an error correction decoding unit 125-2 that uses the coding rate P1-2. 【0029】 Regarding the processing of the components of the transmitting devices 101-1 and 101-2 and the receiving devices 102-1 and 102-2, and the transmission parameters such as the coding rates P1-1 and P1-2, they are the same as those of the transmitting device 101 and the receiving device 102, and the transmission parameters such as the coding rate P1 shown in FIG. 11. 【0030】 As a result, in two SVD-MIMO transmission systems, it is possible to simultaneously transmit two signals with different communication qualities, that is, two signals with different combinations of transmission parameters such as coding rates P1-1 and P1-2. Note that the transmission parameters are individually set for each of the transmission data SD-1 and SD-2. 【0031】 FIG. 13 is a diagram for explaining the outline of the TDM method. The TDM method is a communication method that multiplexes by sequentially transmitting a plurality of different signals in the time direction on one transmission path. 【0032】 The multiplexing unit 116 is provided in the transmission device 101 of the mobile station described above. The multiplexing unit 116 inputs three signals A, B, and C with different communication qualities, and switches a switch based on a preset data amount to perform TDM multiplexing on these signals, and outputs a multiplexed signal in the order of signals A, B, and C. As a result, a multiplexed signal in which signals A, B, and C are arranged in order in the time direction is output. 【0033】 The demultiplexing unit 120 is provided in the receiving device 102 of the base station described above. The demultiplexing unit 120 inputs a multiplexed signal, and switches a switch based on a preset data amount to perform TDM demultiplexing on the multiplexed signal, and outputs signals A, B, and C. 【0034】 FIG. 14 is a diagram showing a configuration example when two signals are simultaneously transmitted in a transmission system of one SVD-MIMO method that realizes the TDM method in the prior art, and shows the second method described above. 【0035】 This transmission system includes a transmission device 106 of a mobile station and a receiving device 107 of a base station, and is a system in which the TDM method is applied to the transmission devices 101-1 and 101-2 and the receiving devices 102-1 and 102-2 shown in FIG. 12. 【0036】 The transmitting device 106 receives transmission data SD-1, which is to be transmitted at a first communication quality, and transmission data SD-2, which is to be transmitted at a second communication quality, and transmits a transmission signal S of a UL frame, which is multiplexed using the TDM method, to the receiving device 107. The transmitting device 106 includes error correction coding units 111-1 and 111-2 using coding rates P1-1 and P1-2 respectively, time interleaving processing units 112-1 and 112-2 using time interleaving lengths P2-1 and P2-2 respectively, modulation units 113-1 and 113-2 using modulation bit counts P3-1 and P3-2 respectively, transmission weight multiplication units 114-1 and 114-2 using transmission weights SW-1 and SW-2 respectively, a multiplexing unit 116, and a UL frame constructor 115. 【0037】 The receiving device 107 receives the received signal R of the UL frame corresponding to the transmitted signal S of the UL frame, and outputs received data RD-1 corresponding to the transmitted data SD-1 to be transmitted at a first communication quality, and received data RD-2 corresponding to the transmitted data SD-2 to be transmitted at a second communication quality. The receiving device 107 includes a UL frame analysis unit 121, a multiplexing and separation unit 120, a received weight multiplication unit 122-1, 122-2 using received weights RW-1, RW-2 respectively, a demodulation unit 123-1, 123-2 using modulation bit counts P3-1, P3-2 respectively, a time deinterleaving processing unit 124-1, 124-2 using time interleaving lengths P2-1, P2-2 respectively, and an error correction decoding unit 125-1, 125-2 using coding rates P1-1, P1-2 respectively. 【0038】 The processing of each component of the transmitting device 106 and the receiving device 107, as well as transmission parameters such as coding rates P1-1 and P1-2, are the same as those for the transmitting devices 101-1 and 101-2 and the receiving devices 102-1 and 102-2 shown in Figure 12, the multiplexing unit 116 and the multiplexing / deselection unit 120 shown in Figure 13, and the transmission parameters such as coding rates P1-1 and P1-2 shown in Figure 12. 【0039】 This allows a single transmission system that implements signal multiplexing using the TDM method to simultaneously transmit two signals with different communication qualities, i.e., two signals with different combinations of transmission parameters. The transmission parameters are set individually for each transmitted data, SD-1 and SD-2. 【0040】 Figure 15 illustrates an example of storing transmission data SD-1 and SD-2 in a UL frame using the TDM method, showing an example of storage by the UL frame component 115 of the transmitter 106 shown in Figure 14. This UL frame consists of four OFDM symbols, as shown in Figure 8. 【0041】 The signals of the transmission data SD-1 and SD-2 included in the multiplexed signals by the multiplexing unit 116 are arranged sequentially in the time direction, using OFDM symbols as units, and stored in the UL frame. In this example, the two OFDM symbols in transmission data SD-1 and the two OFDM symbols in transmission data SD-2 are stored in the UL frame in this order, thereby forming a UL frame consisting of four OFDM symbols. 【0042】 Figure 16 shows the transmission timing of transmission data SD-1 and SD-2 on the time axis in a UL frame. As shown in Figure 16, during the transmission time of one UL frame, transmission data SD-1 is transmitted first, followed by transmission data SD-2, in the time direction. 【0043】 Furthermore, the maximum number of signals with different communication qualities (signals with different combinations of transmission parameters) that can be transmitted simultaneously by the transmission system depends on the number of OFDM symbols that make up the UL frame. This is because only one signal can be stored in one OFDM symbol, and it is not possible to store multiple signals with different communication qualities in one OFDM symbol. The example in Figure 15 shows a case where one UL frame consists of four OFDM symbols, and in this case, the maximum number of signals with different communication qualities that can be transmitted simultaneously is four. [Prior art documents] [Patent Documents] 【0044】 [Patent Document 1] Patent No. 6328021 [Non-patent literature] 【0045】 [Non-Patent Document 1] "Portable quasi-microwave OFDM digital wireless transmission system for transmitting ultra-high-definition television broadcast program material," ARIB STD-B75, Association of Radio Industries and Businesses (ARIB) [Overview of the project] [Problems that the invention aims to solve] 【0046】 As mentioned above, the second method shown in Figure 14 illustrates the case where multiple signals with different communication qualities, i.e., multiple signals with different combinations of transmission parameters, are transmitted using a single SVD-MIMO transmission system that implements the TDM method. 【0047】 However, this method had the problem that the circuit size increased in proportion to the number of signals to be transmitted (the number of transmitted data SDs). 【0048】 Specifically, as the number of signals to be transmitted increases, the error correction coding unit 111, time interleaving processing unit 112, modulation unit 113, and transmission weight multiplication unit 114 of the transmitting device 106 become necessary. In addition, the receiving weight multiplication unit 122, demodulation unit 123, time deinterleaving processing unit 124, and error correction decoding unit 125 of the receiving device 107 also become necessary. 【0049】 Therefore, the present invention has been made to solve the above-mentioned problems, and its objective is to provide a transmitting device and a receiving device that can suppress an increase in circuit size when multiple signals with different combinations of transmission parameters are multiplexed and transmitted using the TDM method in an SVD-MIMO transmission system. [Means for solving the problem] 【0050】 To solve the above problem, the transmitting device of claim 1, under an SVD-MIMO transmission system that wirelessly transmits data from a transmitting device to a receiving device via a transmission path, inputs a plurality of transmission data with different combinations of transmission parameters including coding rate, time interleave length, modulation bit count, and transmission weight, and multiplexes and transmits the plurality of transmission data, comprising a plurality of transmission processing units corresponding to the plurality of transmission data, as well as a multiplexing unit, a transmission weight multiplication unit, and a UL frame configuration unit, each of the plurality of transmission processing units inputs the transmission data corresponding to the plurality of transmission data, and modulates the transmission data with respect to the coding rate, time interleave length, and modulation bit count corresponding to the transmission data, respectively. The system is characterized by performing correction coding, time interleaving, and modulation transmission processing to generate a signal after transmission processing; the multiplexing unit performing TDM multiplexing on the multiple transmission-processed signals generated by the multiple transmission processing units and outputting a multiplexed signal; the transmission weight multiplication unit multiplying the multiplexed signal output by the multiplexing unit by the transmission weight calculated by the receiving device through singular value decomposition of the channel matrix of the transmission path and outputting a multiplexed signal after multiplication; and the UL frame constructing unit arranging OFDM symbols corresponding to each of the multiple transmission data included in the multiplexed signal output by the transmission weight multiplication unit in order in the time direction to construct a UL frame and transmitting the UL frame to the receiving device. 【0051】 Furthermore, the transmitting device according to claim 2 is an SVD-MIMO transmission system that wirelessly transmits data from a transmitting device to a receiving device via a transmission path, and inputs a plurality of transmission data with different combinations of transmission parameters including coding rate, time interleave length, modulation bit count, and transmission weight, and multiplexes and transmits the plurality of transmission data, comprising a multiplexing unit, an error correction coding transmission parameter switching unit, an error correction coding unit, a time interleave transmission parameter switching unit, a time interleave processing unit, a modulation transmission parameter switching unit, a modulation unit, a signal switching control unit, a transmission weight multiplication unit, and a UL frame configuration unit, wherein the multiplexing unit inputs the plurality of transmission data, performs TDM multiplexing on the plurality of transmission data based on a switching signal for multiplexing output by the signal switching control unit, and outputs multiplexed data, the error correction coding transmission parameter switching unit inputs a plurality of coding rates corresponding to the plurality of transmission data, selects and outputs one coding rate from the plurality of coding rates based on a switching signal for error correction coding output by the signal switching control unit, and the error correction coding unit outputs the The system inputs multiplexed data and the coding rate output by the error correction coding transmission parameter switching unit, performs error correction coding on the transmission data corresponding to the coding rate among the multiple transmission data included in the multiplexed data, outputs the multiplexed signal after error correction coding, the time interleaving transmission parameter switching unit inputs a plurality of time interleaving lengths corresponding to the plurality of transmission data, selects and outputs one of the plurality of time interleaving lengths based on the time interleaving switching signal output by the signal switching control unit, the time interleaving processing unit inputs the multiplexed signal output by the error correction coding unit and the time interleaving length output by the time interleaving transmission parameter switching unit, performs time interleaving processing on the signal corresponding to the time interleaving length among the plurality of signals included in the multiplexed signal, outputs the multiplexed signal after time interleaving processing, and the modulation transmission parameter switching unit inputs a plurality of modulation bit counts corresponding to the plurality of transmission data.Based on the modulation switching signal output by the signal switching control unit, the modulation unit selects and outputs one of the multiple modulation bit counts. The modulation unit receives the multiplexed signal output by the time interleaving processing unit and the modulation bit count output by the modulation transmission parameter switching unit, modulates the signal corresponding to the modulation bit count among the multiple signals included in the multiplexed signal by the modulation bit count, and outputs the modulated multiplexed signal. The transmit weight multiplication unit multiplies the modulated multiplexed signal output by the modulation unit by the transmit weight calculated by the receiving device through singular value decomposition of the channel matrix of the transmission path, and outputs the multiplied multiplexed signal. The UL frame configuration unit configures a UL frame by arranging the OFDM symbols corresponding to each of the multiple transmission data included in the multiplexed signal output by the transmit weight multiplication unit in the time direction, and transmits the UL frame to the receiving device. The switching control unit generates a switching signal for multiplexing that indicates the timing of each of the multiple transmission data to be multiplexed by the multiplexing unit, outputs the switching signal for multiplexing to the multiplexing unit, generates a switching signal for error correction coding that indicates the timing of each of the multiple transmission data included in the multiple data to be error-corrected coded by the error correction coding unit, outputs the switching signal for error correction coding to the error correction coding transmission parameter switching unit, generates a switching signal for time interleaving that indicates the timing of each of the multiple signals included in the multiple signal to be time-interleaved by the time interleaving processing unit, outputs the switching signal for time interleaving to the time interleaving transmission parameter switching unit, and generates a switching signal for modulation that indicates the timing of each of the multiple signals included in the multiple signal to be modulated by the modulation unit, outputs the switching signal for modulation to the modulation transmission parameter switching unit. 【0052】 Furthermore, the transmitting device of claim 3 is the transmitting device of claim 2, further comprising a power distribution transmission parameter switching unit and a power distribution processing unit, wherein the power distribution transmission parameter switching unit inputs a plurality of power distributions corresponding to the plurality of transmission data, selects and outputs one of the plurality of power distributions based on the power distribution switching signal output by the signal switching control unit, the power distribution processing unit inputs the multiplexed signal output by the modulation unit and the power distribution output by the power distribution transmission parameter switching unit, performs power distribution processing for each virtual transmission path of the intrinsic mode according to the SVD-MIMO method with respect to the signal corresponding to the power distribution among the plurality of signals included in the multiplexed signal, outputs the multiplexed signal after power distribution processing, the transmission weight multiplication unit multiplies the power distribution processing output by the power distribution processing unit by the transmission weight, and the signal switching control unit further generates the power distribution switching signal indicating the timing of each of the plurality of signals included in the multiplexed signal for which power distribution processing is performed by the power distribution processing unit, and outputs the power distribution switching signal to the power distribution transmission parameter switching unit. 【0053】 Furthermore, the receiving device of claim 4, under an SVD-MIMO transmission system that wirelessly transmits data from a transmitting device to the receiving device via a transmission path, receives a UL frame from the transmitting device that includes multiplexed signals of multiple transmission data with different combinations of transmission parameters including coding rate, time interleave length, modulation bit count, and transmission weight, multiplexes and separates the multiplexed signals, and outputs multiple received data corresponding to the multiple transmission data, comprising a UL frame analysis unit, a received weight multiplication unit, a multiplexing and separation unit, and a plurality of receiving processing units corresponding to the plurality of received data, wherein the UL frame analysis unit reads OFDM symbols corresponding to each of the plurality of transmission data arranged sequentially in the time direction from the UL frame, and the received weight multiplication unit The UL frame analysis unit reads out the multiplexed signal of the OFDM symbol, and the receiving device multiplies it by the received weight calculated by singular value decomposition of the channel matrix of the transmission line, and outputs the multiplied multiplexed signal. The multiplexing / decoupling unit performs TDM-style multiplexing / decoupling on the multiplexed signal output by the received weight multiplication unit, and outputs a plurality of signals. Each of the plurality of receiving processing units receives the signal corresponding to its receiving processing unit from the plurality of signals output by the multiplexing / decoupling unit, and performs demodulation, time deinterleaving, and error correction decoding on the signal, respectively, with the modulation bit count, time interleaving length, and coding rate corresponding to the transmission data of the signal, and outputs the signal after error correction decoding as the received data. 【0054】 Furthermore, the receiving device of claim 5, under an SVD-MIMO transmission system that wirelessly transmits data from a transmitting device to the receiving device via a transmission path, receives a UL frame from the transmitting device that includes multiplexed signals of multiple transmission data with different combinations of transmission parameters including coding rate, time interleave length, modulation bit count, and transmission weight, multiplexes and separates the multiplexed signals, and outputs multiple received data corresponding to the multiple transmission data, comprising a UL frame analysis unit, a receive weight multiplication unit, a demodulation transmission parameter switching unit, a demodulation unit, a time deinterleaving transmission parameter switching unit, a time deinterleaving processing unit, an error correction decoding transmission parameter switching unit, an error correction decoding unit, a multiplexing and separation unit, and a signal switching control unit, wherein the UL frame analysis unit reads OFDM symbols corresponding to each of the multiple transmission data arranged sequentially in the time direction from the UL frame, and the receive weight multiplication unit multiplies the multiplexed signals of the OFDM symbols read by the UL frame analysis unit by the receive weight calculated by the receiving device by singular value decomposition of the channel matrix of the transmission path, and after multiplication The system outputs a multiplexed signal, the demodulation transmission parameter switching unit inputs a plurality of modulation bit counts corresponding to the plurality of transmission data, and based on the demodulation switching signal output by the signal switching control unit, selects and outputs one of the plurality of modulation bit counts, the demodulation unit inputs the multiplexed signal output by the receive weight multiplication unit and the modulation bit count output by the demodulation transmission parameter switching unit, modulates the signal corresponding to the modulation bit count among the plurality of signals included in the multiplexed signal by the modulation bit count, and outputs the modulated multiplexed signal, the time deinterleaving transmission parameter switching unit inputs a plurality of time interleaving lengths corresponding to the plurality of transmission data, and based on the time deinterleaving switching signal output by the signal switching control unit, selects and outputs one of the plurality of time interleaving lengths, the time deinterleaving processing unit inputs the multiplexed signal output by the demodulation unit and the time interleaving length output by the time deinterleaving transmission parameter switching unit,The system performs time deinterleaving on the signal corresponding to the time interleaving length among the multiple signals included in the multiplexed signal, and outputs the multiplexed signal after time deinterleaving. The error correction decoding transmission parameter switching unit receives a plurality of coding rates corresponding to the plurality of transmission data, and based on the error correction decoding switching signal output by the signal switching control unit, selects and outputs one coding rate from the plurality of coding rates. The error correction decoding unit receives the multiplexed signal output by the time deinterleaving processing unit and the coding rate output by the error correction decoding transmission parameter switching unit, and performs error correction decoding on the signal corresponding to the coding rate among the plurality of signals included in the multiplexed signal, and outputs the multiplexed data after error correction decoding. The multiplex separation unit receives the multiplexed data output by the error correction decoding unit and performs TDM multiplex separation based on the multiplex separation switching signal output by the signal switching control unit, and outputs the multiple receivers. The system outputs signal data, the signal switching control unit generates a switching signal for demodulation indicating the timing of each of the multiple signals included in the multiplexed signal that is demodulated by the demodulation unit, outputs the switching signal for demodulation to the demodulation transmission parameter switching unit, the time deinterleaving processing unit generates a switching signal for time interleaving indicating the timing of each of the multiple signals included in the multiplexed signal that is subjected to time deinterleaving, outputs the switching signal for time interleaving to the time deinterleaving transmission parameter switching unit, the error correction decoding unit generates a switching signal for error correction decoding indicating the timing of each of the multiple signals included in the multiplexed signal that is subjected to error correction decoding, outputs the switching signal for error correction decoding to the error correction decoding transmission parameter switching unit, the multiplex separation unit generates a switching signal for multiplex separation indicating the timing of each of the multiple received data included in the multiplexed data that is multiplexed, and outputs the switching signal for multiplex separation to the multiplex separation unit. 【0055】 Furthermore, the receiving device of claim 6 is the receiving device of claim 5, further comprising a power distribution transmission parameter switching unit and a power distribution processing unit, wherein the power distribution transmission parameter switching unit inputs a plurality of power distributions corresponding to the plurality of transmission data, selects and outputs one of the plurality of power distributions based on the power distribution switching signal output by the signal switching control unit, and the power distribution processing unit inputs the multiplexed signal output by the receiving weight multiplication unit and the power distribution output by the power distribution transmission parameter switching unit, and applies the power distribution to the signal corresponding to the power distribution among the plurality of signals included in the multiplexed signal, thereby applying the SVD- The system is characterized by performing power distribution processing for each virtual transmission path of intrinsic modes using the MIMO method, outputting a multiplexed signal after power distribution processing, the demodulation unit receiving the multiplexed signal output by the power distribution processing unit and the number of modulation bits, modulating the signal corresponding to the number of modulation bits among the multiple signals included in the multiplexed signal by the number of modulation bits, and outputting the modulated multiplexed signal, the signal switching control unit further generating a switching signal for power distribution indicating the timing of each of the multiple signals included in the multiplexed signal that is subjected to power distribution processing by the power distribution processing unit, and outputting the switching signal for power distribution to the power distribution transmission parameter switching unit. [Effects of the Invention] 【0056】 As described above, according to the present invention, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted using the TDM method in an SVD-MIMO transmission system, it is possible to suppress an increase in circuit size. [Brief explanation of the drawing] 【0057】 [Figure 1] This is a block diagram showing an example configuration of the transmitting device in Example 1. [Figure 2] This is a block diagram showing an example configuration of the receiving device in Example 1. [Figure 3]This diagram shows the transmission timing of transmitted data SD-1, ..., SD-N on the time axis in a UL frame. [Figure 4] This is a block diagram showing an example configuration of the transmitting device in Example 2. [Figure 5] This is a block diagram showing an example configuration of the receiving device in Example 2. [Figure 6] This is a block diagram showing an example configuration of the transmitting device in Example 3. [Figure 7] This is a block diagram showing an example configuration of the receiving device in Example 3. [Figure 8] This diagram illustrates an example of a UL frame configuration. [Figure 9] This diagram illustrates the general structure of MIMO transmission using the SVD-MIMO method. [Figure 10] This diagram illustrates the transmission and reception flow of the transmit wait switch. [Figure 11] This figure shows an example configuration of a conventional SVD-MIMO transmission system. [Figure 12] This figure shows an example configuration in which two signals are transmitted using two SVD-MIMO transmission systems in conventional technology. [Figure 13] This diagram illustrates the general outline of the TDM method. [Figure 14] This figure shows an example configuration in which two signals are simultaneously transmitted using a single SVD-MIMO transmission system that implements the TDM method, according to conventional technology. [Figure 15] This diagram illustrates an example of storing the transmission data SD-1 and SD-2 in a UL frame using the TDM method. [Figure 16] This diagram shows the transmission timing of transmitted data SD-1 and SD-2 on the time axis in a UL frame. [Modes for carrying out the invention] 【0058】 Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. The transmission system of Embodiment 1 is characterized in that, when transmitting multiple signals with different combinations of transmission parameters, the transmission weight multiplication unit on the transmitting side and the reception weight multiplication unit on the receiving side are each consolidated into one. 【0059】 Furthermore, the transmission system of Example 2 is characterized in that, in addition to the transmission system of Example 1, the error correction coding unit, time interleaving processing unit and modulation unit on the transmitting side, and the demodulation unit, time deinterleaving processing unit and error correction decoding unit on the receiving side are each integrated into one unit. 【0060】 Furthermore, the transmission system of Example 3 is characterized in that, in addition to the transmission system of Example 2, the power distribution processing unit on the transmitting side and the power distribution processing unit on the receiving side are each consolidated into one unit. 【0061】 [Example 1] First, let's describe Example 1. As mentioned above, the transmission system of Example 1 integrates the transmit weight multiplication unit on the transmitting side and the receive weight multiplication unit on the receiving side into one unit each when transmitting multiple signals with different combinations of transmission parameters. 【0062】 In the standard of Non-Patent Document 1 mentioned above, the transmit weight SW and receive weight RW are common to all OFDM symbols stored in the UL frame. Therefore, even when TDM multiplexing is performed on multiple signals with different combinations of transmission parameters in an SVD-MIMO transmission system compliant with the standard of Non-Patent Document 1, and these signals are stored in a UL frame, the transmit weight SW and receive weight RW are common to all OFDM symbols within the UL frame. 【0063】 In other words, when the transmission system that transmits two signals as shown in Figure 14 is extended to N signals, and each of the transmitted data SD-1, SD-2, ..., SD-N signals is stored in the same UL frame, then the transmit weight SW-1 = transmit weight SW-2 = ... = transmit weight SW-N, and the receive weight RW-1 = receive weight RW-2 = ... = receive weight RW-N. N is an integer greater than or equal to 2. 【0064】 The inventor focused on this point and found that it is not necessary to perform the transmission weight SW multiplication process for each of the multiple transmission data signals SD-1, ..., SD-N, nor is it necessary to perform the reception weight RW multiplication process for each of the signals corresponding to the multiple received transmission data SD-1, ..., SD-N. For this reason, in Example 1, the transmission weight multiplication unit on the transmitting side and the reception weight multiplication unit on the receiving side are each consolidated into one. This makes it possible to suppress an increase in circuit size. 【0065】 (Transmitter / Example 1) The transmitting device of Example 1 will now be described. Figure 1 is a block diagram showing an example configuration of the transmitting device of Example 1. For the sake of simplicity, only the components directly related to the present invention are shown in Figure 1, and components not directly related have been omitted. The same applies to Figures 2, 4, 5, and 6, which will be described later. 【0066】 This transmitting device 1 is a wireless transmission device on the mobile station side and comprises a transmission processing unit 10-1, ..., 10-N, a multiplexing unit 14, a transmission weight multiplication unit 15, and a UL frame constructor 16. The transmission processing unit 10-1 comprises an error correction coding unit 11-1, a time interleaving processing unit 12-1, and a modulation unit 13-1, ..., the transmission processing unit 10-N comprises an error correction coding unit 11-N, a time interleaving processing unit 12-N, and a modulation unit 13-N. 【0067】 Transmitter 1 receives multiple transmission data SD-1, ..., SD-N with different combinations of transmission parameters into each transmission processing unit 10-1, ..., 10-N, performs transmission processing such as error correction coding, performs TDM multiplexing on the multiple processed signals, multiplies the multiplexed signals by a transmission weight SW, and transmits the UL frame transmission signal S to receiver 2 shown in Figure 2, which will be described later, using the MIMO method. 【0068】 The coding rate P1-1, time interleave length P2-1, and modulation bit count P3-1 are transmission parameters used when the transmission processing unit 10-1 processes the transmission data SD-1, ..., and the coding rate P1-N, time interleave length P2-N, and modulation bit count P3-N are transmission parameters used when the transmission processing unit 10-N processes the transmission data SD-N. 【0069】 These transmission parameters are pre-set by the user in the receiving device 2 shown in Figure 2 (described later) and transmitted from the receiving device 2 to the transmitting device 1 in DL frames. In other words, these transmission parameters are maintained in both the transmitting device 1 and the receiving device 2 (described later), and the same values ​​are used. 【0070】 Furthermore, the coding rates P1-1,...,P1-N and the modulation bit counts P3-1,...,P3-N among these transmission parameters may be calculated in the receiving device 2 described later and transmitted from the receiving device 2 to the transmitting device 1 in DL frames. 【0071】 Furthermore, the transmit weight SW is a transmission parameter that is multiplied by the multiplexed signal (described later) by the transmit weight multiplier 15. It is calculated in the receiving device 2 (described later), transmitted from the receiving device 2 to the transmitting device 1 in a DL frame, and held in the transmitting device 1. 【0072】 The error correction coding unit 11-1 receives the transmission data SD-1 as input, along with the coding rate P1-1 corresponding to the transmission data SD-1, performs error correction coding on the transmission data SD-1 using the coding rate P1-1, and outputs the signal after error correction coding to the time interleaving processing unit 12-1. 【0073】 The same processing is performed on error correction coding units 11-2,..., and 11-N as on error correction coding unit 11-1. In other words, error correction coding units 11-2,..., and 11-N perform error correction coding on the transmitted data SD-2,..., and SD-N using coding rates P1-2,..., and P1-N, respectively. 【0074】 The time interleaving processing unit 12-1 receives the error-corrected encoded signal from the error-corrected encoding unit 11-1, as well as the time interleaving length P2-1 corresponding to the transmitted data SD-1. The time interleaving processing is then performed on the error-corrected encoded signal according to the time interleaving length P2-1, and the signal after time interleaving is output to the modulation unit 13-1. 【0075】 The same processing is performed on the time interleaving processing units 12-2, ..., 12-N as on the time interleaving processing unit 12-1. In other words, the time interleaving processing units 12-2, ..., 12-N perform time interleaving processing on the error-corrected encoded signal, each using time interleaving lengths P2-2, ..., P2-N. 【0076】 The modulation unit 13-1 receives the signal after time interleaving processing from the time interleaving processing unit 12-1, as well as the number of modulation bits P3-1 corresponding to the transmitted data SD-1. The modulation unit 13-1 modulates the signal after time interleaving processing using a predetermined modulation scheme with the number of modulation bits P3-1, and outputs the modulated signal to the multiplexing unit 14. 【0077】 The modulation units 13-2, ..., 13-N undergo the same processing as modulation unit 13-1. In other words, modulation units 13-2, ..., 13-N modulate the signal after time interleaving processing using predetermined modulation schemes with modulation bit counts P3-2, ..., P3-N, respectively, and output the modulated signal to the multiplexing unit 14. 【0078】 The multiplexing unit 14 receives and holds the modulated signals from the modulation units 13-1, ..., and 13-N, and performs TDM multiplexing on these signals by switching a switch based on, for example, a preset amount of data (the amount of data for each signal corresponding to the transmitted data SD-1, ..., and SD-N included in the modulated signals), and outputs the multiplexed signal to the transmission weight multiplication unit 15. This generates a multiplexed signal in which the modulated signals input from modulation unit 13-1, ..., and the modulated signals input from modulation unit 13-N are arranged in order in the time direction. 【0079】 The transmit weight multiplier unit 15 receives the multiplexed signal from the multiplexing unit 14 and the transmit weight SW calculated by the receiving device 2 shown in Figure 2 (described later). The unit multiplies the multiplexed signal by the transmit weight SW and outputs the multiplied multiplexed signal to the UL frame constructor 16. As a result, the same transmit weight SW is multiplied by the modulated signals corresponding to each of the transmit data SD-1, ..., SD-N included in the multiplexed signal. 【0080】 The UL frame constructor 16 receives the multiplied multiplexed signal from the transmit weight multiplication unit 15 and modulates the multiplied multiplexed signal to generate a signal that can be transmitted wirelessly. The UL frame constructor 16 then constructs a UL frame by arranging the OFDM symbols corresponding to the transmit data SD-1, ..., SD-N in order in the time direction, with the OFDM symbols as the unit (see Figure 15 above). The UL frame constructor 16 then transmits the transmit signal S of the UL frame to the receiver 2 using the MIMO method. 【0081】 As described above, the transmitting device 1 of Example 1 receives multiple transmission data SD-1,...,SD-N with different combinations of transmission parameters as input, and the transmission processing units 10-1,...,10-N perform error correction coding, time interleaving processing, and modulation transmission processing for the corresponding transmission data SD-1,...,SD-N using the corresponding coding rate P1-1,...,P1-N, time interleaving length P2-1,...,P2-N, and modulation bit count P3-1,...,P3-N, respectively. 【0082】 The multiplexing unit 14 performs TDM multiplexing on the multiple signals after transmission processing. The transmission weight multiplication unit 15 multiplies the multiplexed signals by the transmission weight SW. The UL frame constructing unit 16 modulates the multiplied multiplexed signals to construct an UL frame and transmits the transmission signal S of the UL frame using the MIMO method. 【0083】 As a result, in an SVD-MIMO transmission system conforming to the standard of Non-Patent Document 1 mentioned above, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted simultaneously using the TDM method, even if signals with different combinations of transmission parameters are stored for each OFDM symbol in the UL frame, the transmit weight SW is common to all OFDM symbols, so the transmit weight multiplier 15 can be consolidated into one. 【0084】 Therefore, in an SVD-MIMO transmission system, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted using the TDM method, the increase in circuit size can be suppressed. 【0085】 (Receiving device / Example 1) Next, the receiving device of Example 1 will be described. Figure 2 is a block diagram showing an example configuration of the receiving device of Example 1. 【0086】 This receiving device 2 is a wireless transmission device on the base station side and includes a UL frame analysis unit 21, a received weight multiplication unit 22, a multiplexing / decoupling unit 23, and receiving processing units 20-1, ..., 20-N. The receiving processing unit 20-1 includes a demodulation unit 24-1, a time deinterleaving processing unit 25-1, and an error correction decoding unit 26-1, ..., and the receiving processing unit 20-N includes a demodulation unit 24-N, a time deinterleaving processing unit 25-N, and an error correction decoding unit 26-N. 【0087】 The receiving device 2 receives the received signal R of the UL frame (the received signal R after the transmission signal S has passed through the transmission path) corresponding to the transmitted signal S of the UL frame transmitted by the transmitting device 1 shown in Figure 1, using the MIMO method. It then multiplies the received signal R by a received weight RW and performs multiplexing using the TDM method. Each of the multiplexed signals is input to the receiving processing units 20-1, ..., 20-N for each system, and receives processing such as demodulation. It then outputs multiple received data RD-1, ..., RD-N corresponding to multiple transmitted data SD-1, ..., SD-N with different combinations of transmission parameters. 【0088】 The coding rate P1-1, time interleave length P2-1, and modulation bit count P3-1 are transmission parameters used by the receiving processing unit 20-1 when processing the multiplexed signals, ..., and the coding rate P1-N, time interleave length P2-N, and modulation bit count P3-N are transmission parameters used by the receiving processing unit 20-N when processing the multiplexed signals. 【0089】 These transmission parameters are pre-set by the user in the receiving device 2, and the receiving device 2 transmits these transmission parameters to the transmitting device 1 in DL frames. In other words, these transmission parameters are maintained in both the receiving device 2 and the aforementioned transmitting device 1, and the same values ​​are used. 【0090】 Furthermore, the coding rate P1-1,...,P1-N and the modulation bit count P3-1,...,P3-N among these transmission parameters may be calculated by the receiving device 2 and transmitted from the receiving device 2 to the transmitting device 1 in DL frames. In this case, a transmission parameter calculation unit (not shown) provided in the receiving device 2 obtains data that reflects the propagation environment and determines the coding rate P1-1,...,P1-N and the modulation bit count P3-1,...,P3-N according to this data. For example, the transmission parameter calculation unit (not shown) obtains a large value for the coding rate P1-1,...,P1-N when the propagation environment is good, and a small value when the propagation environment is poor. This allows the transmission rate to be increased when the propagation environment is good, and the error correction capability to be improved when the propagation environment is poor. 【0091】 Furthermore, the received weight RW is a transmission parameter that is multiplied by the multiplexed signal (described later) by the received weight multiplication unit 22, and is calculated by the receiving device 2. In this case, a singular value decomposition unit (not shown) decomposes the channel matrix estimated from the received signal R to determine the transmitted weight SW and the received weight RW. The receiving device 2 then holds the received weight RW among these transmission parameters and transmits the transmitted weight SW to the transmitting device 1 in a DL frame. 【0092】 The UL frame analysis unit 21 receives the UL frame reception signal R in the MIMO method, performs synchronization processing on the reception signal R to detect the beginning of the UL frame and OFDM symbols, and reads out the OFDM symbols arranged sequentially in the time direction from the UL frame, with OFDM symbols as the unit. The UL frame analysis unit 21 then outputs the multiplexed signal of OFDM symbols to the reception weight multiplication unit 22. 【0093】 The receive weight multiplication unit 22 receives the multiplexed signal from the UL frame analysis unit 21 and the receive weight RW calculated by the receiving device 2, multiplies the multiplexed signal by the receive weight RW, and outputs the multiplied multiplexed signal to the multiplex separation unit 23. As a result, the same receive weight RW is multiplied for each signal corresponding to the transmitted data SD-1, ..., SD-N included in the multiplexed signal. 【0094】 The multiplexing and separation unit 23 receives the multiplied multiplexed signal from the receive weight multiplication unit 22 and performs TDM multiplexing and separation of the multiplexed signal by switching a switch based on a preset amount of data (the amount of data to be demodulated for each of the transmitted data SD-1, ..., SD-N). As a result, the multiplexed signal input from the receive weight multiplication unit 22 is separated in order into the signal corresponding to transmitted data SD-1, ..., and the signal corresponding to transmitted data SD-N. 【0095】 The multiplexing and separation unit 23 outputs the respective signals corresponding to the multiplexed and separated transmission data SD-1, ..., SD-N to the corresponding receiving and separation units 20-1, ..., 20-N. 【0096】 The demodulation unit 24-1 receives a signal corresponding to the multiplexed transmission data SD-1 separated from the multiplexing / decoupling unit 23, as well as a modulation bit count P3-1 corresponding to the transmission data SD-1. It then demodulates the signal using a predetermined modulation scheme with a modulation bit count P3-1, and outputs the demodulated signal to the time deinterleaving processing unit 25-1. 【0097】 The same processing is performed on demodulation units 24-2, ..., 24-N as on demodulation unit 24-1. In other words, demodulation units 24-2, ..., 24-N demodulate the multiplexed signals using predetermined modulation schemes with modulation bit counts P3-2, ..., P3-N, respectively. 【0098】 The time deinterleaving processing unit 25-1 receives the demodulated signal from the demodulation unit 24-1 and also receives the time interleaving length P2-1 corresponding to the transmitted data SD-1. The time deinterleaving processing is performed on the demodulated signal according to the time interleaving length P2-1, and the signal after time deinterleaving processing is output to the error correction decoding unit 26-1. 【0099】 The same processing is performed on the time deinterleaving units 25-2, ..., 25-N as on the time deinterleaving unit 25-1. In other words, the time deinterleaving units 25-2, ..., 25-N perform time deinterleaving on the demodulated signal, with time interleaving lengths P2-2, ..., P2-N, respectively. 【0100】 The error correction decoding unit 26-1 receives the signal after time deinterleaving processing from the time deinterleaving processing unit 25-1, as well as the coding rate P1-1 corresponding to the transmitted data SD-1. It then performs error correction decoding on the signal after time deinterleaving processing using the coding rate P1-1, and outputs the error-corrected and decoded signal as received data RD-1. 【0101】 The same processing is performed on the error correction decoding units 26-2, ..., 26-N as on the error correction decoding unit 26-1. In other words, the error correction decoding units 26-2, ..., 26-N perform error correction decoding on the signal after time deinterleaving processing using coding rates P1-2, ..., P1-N, respectively, and output the error-corrected and decoded signal as received data RD-2, ..., and received data RD-N. 【0102】 As described above, according to the receiving device 2 of Embodiment 1, the UL frame analysis unit 21 receives the UL frame reception signal R from the transmitting device 1 using the MIMO method and reads out OFDM symbols from the UL frame. 【0103】 The receive weight multiplication unit 22 multiplies the multiplexed signal of OFDM symbols by the receive weight RW. The multiplex separation unit 23 performs TDM multiplex separation on the multiplexed signal. 【0104】 The receiving processing units 20-1, ..., 20-N receive one of several signals corresponding to the multiplexed transmission data SD-1, ..., SD-N as input, and perform demodulation, time deinterleaving, and error correction decoding on the signal according to the corresponding modulation bit count P3-1, ..., P3-N, time interleaving length P2-1, ..., P2-N, and coding rate P1-1, ..., P1-N, respectively, and output the received data RD-1, ..., RD-N. 【0105】 As a result, in an SVD-MIMO transmission system conforming to the standard of Non-Patent Document 1 mentioned above, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted simultaneously using the TDM method, even if signals with different combinations of transmission parameters are stored for each OFDM symbol in the UL frame, the receive weight RW is common to all OFDM symbols, so the receive weight multiplier 22 can be consolidated into one. 【0106】 Therefore, in an SVD-MIMO transmission system, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted using the TDM method, the increase in circuit size can be suppressed. 【0107】 [Example 2] Next, Example 2 will be described. As mentioned above, the transmission system of Example 2 further integrates the N systems of transmission processing units 10-1, ..., 10-N into one system, as in the transmission system of Example 1. In other words, the transmission system of Example 2 integrates the error correction coding unit, time interleaving processing unit and modulation unit on the transmitting side, and the demodulation unit, time deinterleaving processing unit and error correction decoding unit on the receiving side into one unit each when transmitting multiple signals with different combinations of transmission parameters. 【0108】 Figure 3 shows the transmission timing of transmitted data SD-1, ..., SD-N on the time axis in a UL frame. The horizontal axis represents time. 【0109】 As shown in Figure 3, signals multiplexed using the TDM method are divided in the time direction for each transmit data SD-1, ..., SD-N within a 1UL frame, and transmitted in this order. In other words, each of the transmit data SD-1, ..., SD-N only needs to have its transmission processing (error correction coding, etc.) completed before transmission begins, and it is not necessary to execute processing in parallel between the transmit data SD-1, ..., SD-N. For example, for transmit data SD-N, it is sufficient that the transmission processing is completed by the time transmission begins (α in Figure 3). 【0110】 The inventor focused on this point and found that by performing multiplexing on the transmitting side before transmission processing such as error correction coding, and by individually setting transmission parameters according to the transmission data SD-1, ..., SD-N, it is not necessary to perform transmission processing for each system of transmission data SD-1, ..., SD-N. 【0111】 Therefore, in Example 2, the transmission data SD-1,...,SD-N are multiplexed, and error correction coding, time interleaving processing, and modulation transmission processing are performed on the multiplexed data while switching the transmission parameters corresponding to the transmission data SD-1,...,SD-N, and the N systems of the transmission processing units 10-1,...,10-N are consolidated into one system. This makes it possible to suppress an increase in circuit size. 【0112】 (Transmitter / Example 2) The transmitting device of Example 2 will now be described. Figure 4 is a block diagram showing an example configuration of the transmitting device of Example 2. 【0113】 This transmitting device 3 is a wireless transmission device on the mobile station side and includes a signal switching control unit 31, a transmission parameter switching unit (transmission parameter switching unit for error correction coding) 32-1, a transmission parameter switching unit (transmission parameter switching unit for time interleaving) 32-2, a transmission parameter switching unit (transmission parameter switching unit for modulation) 32-3, a multiplexing unit 33, an error correction coding unit 34, a time interleaving processing unit 35, a modulation unit 36, a transmission weight multiplication unit 37, and a UL frame configuration unit 38. 【0114】 Transmitter 3 receives multiple transmission data SD-1, ..., SD-N with different combinations of transmission parameters, performs TDM multiplexing on these data, performs transmission processing such as error correction coding on the multiplexed data while switching transmission parameters, multiplies the multiplexed signal after transmission processing by the transmission weight SW, and transmits the UL frame transmission signal S to receiver 4 shown in Figure 5, which will be described later, using the MIMO method. 【0115】 The coding rates P1-1,...,P1-N are transmission parameters used when the error correction coding unit 34 processes the transmitted data SD-1,...,SD-N, with one of these selected by the transmission parameter switching unit 32-1. 【0116】 The time interleave lengths P2-1, ..., P2-N are transmission parameters selected by the transmission parameter switching unit 32-2, and used by the time interleave processing unit 35 when processing the signals corresponding to the transmitted data SD-1, ..., SD-N. 【0117】 The modulation bit counts P3-1, ..., P3-N are transmission parameters used when the modulation unit 36 ​​processes the signals corresponding to the transmitted data SD-1, ..., SD-N, with one of these being selected by the transmission parameter switching unit 32-3. 【0118】 The transmit weight SW is a transmission parameter that is multiplied by the modulated multiplexed signal (described later) by the transmit weight multiplier 37. These transmission parameters are the same as those in Embodiment 1 described above. 【0119】 The signal switching control unit 31 generates switching signals to control the switching timing so that the multiplexing unit 33, error correction coding unit 34, time interleaving processing unit 35, and modulation unit 36 ​​can process each of the transmission data SD-1, ..., SD-N included in the multiplexed signal. 【0120】 Specifically, the signal switching control unit 31 generates a switching signal for multiplexing to control the timing of switching the transmission data SD-1, ..., SD-N so that the UL frame constructor 38 stores the multiplied multiplexed signals input from the transmission weight multiplication unit 37 in the UL frame in that order. 【0121】 For example, the signal switching control unit 31 generates a switching signal for multiplexing so that each of the transmission data SD-1, ..., SD-N input to the multiplexing unit 33 is divided by a preset data amount (the amount of data for which error correction coding is performed for each of the transmission data SD-1, ..., SD-N). Specifically, when the multiplexing unit 33 detects that the input data has reached a preset data amount according to the switch position, it outputs a flag signal to the signal switching control unit 31, and the signal switching control unit 31 generates a switching signal for multiplexing when it receives the flag signal from the multiplexing unit 33. Then, the signal switching control unit 31 outputs the switching signal for multiplexing to the multiplexing unit 33. 【0122】 Furthermore, the signal switching control unit 31 generates a switching signal for error correction coding to select one of the coding rates P1-1,...,P1-N to be applied to the transmitted data SD-1,...,SD-N included in the multiplexed signal input to the error correction coding unit 34 from the multiplexing unit 33, in accordance with the timing of the transmitted data SD-1,...,SD-N included in the transmitted data SD-1,...,SD-N at that timing. 【0123】 For example, the signal switching control unit 31 generates a switching signal for error correction coding based on a preset amount of data (the amount of data for which error correction coding is performed for each of the transmitted data SD-1, ..., SD-N) for the multiplexed signals input to the error correction coding unit 34 from the multiplexing unit 33. Specifically, when the error correction coding unit 34 detects that the input multiplexed signals have reached a preset amount of data, it outputs a flag signal to the signal switching control unit 31, and the signal switching control unit 31 generates a switching signal for error correction coding when it receives the flag signal from the error correction coding unit 34. The signal switching control unit 31 then outputs the switching signal for error correction coding to the transmission parameter switching unit 32-1. In other words, the signal switching control unit 31 generates and outputs a switching signal for error correction coding when the multiplexed signals input to the error correction coding unit 34 have reached a preset amount of data. 【0124】 Furthermore, the signal switching control unit 31 generates a switching signal for time interleaving to select one of the time interleaving lengths P2-1,...,P2-N to be applied to the signal corresponding to the transmission data SD-1,...,SD-N included in the error-corrected encoded multiplexed signal input by the error-corrected encoding unit 34 to the time interleaving processing unit 35. 【0125】 For example, the signal switching control unit 31 generates a switching signal for time interleaving based on a preset data amount (the amount of data for which time interleaving processing is performed for each signal corresponding to the transmission data SD-1, ..., SD-N) for the multiplexed signals after error correction coding input to the time interleaving processing unit 35 from the error correction coding unit 34. Specifically, when the time interleaving processing unit 35 detects that the input multiplexed signals have reached a preset data amount, it outputs a flag signal to the signal switching control unit 31, and the signal switching control unit 31 generates a switching signal for time interleaving when it receives the flag signal from the time interleaving processing unit 35. The signal switching control unit 31 then outputs the switching signal for time interleaving to the transmission parameter switching unit 32-2. In other words, the signal switching control unit 31 generates and outputs a switching signal for time interleaving when the multiplexed signals input to the time interleaving processing unit 35 have reached a preset data amount. 【0126】 Furthermore, the signal switching control unit 31 generates a modulation switching signal to select one of the modulation bit counts P3-1,...,P3-N to be applied to the signal corresponding to the transmission data SD-1,...,SD-N included in the time-interleaved multiplexed signal input to the modulation unit 36 ​​from the time-interleaved processing unit 35, in accordance with the timing of the signal corresponding to the transmission data SD-1,...,SD-N at that timing. 【0127】 For example, the signal switching control unit 31 generates a switching signal for modulation based on a preset data amount (the amount of data to be modulated for each signal corresponding to the transmission data SD-1, ..., SD-N) for the multiplexed signal that the modulation unit 36 ​​receives from the time interleaving processing unit 35 after time interleaving. Specifically, when the modulation unit 36 ​​detects that the input multiplexed signal has reached a preset data amount, it outputs a flag signal to the signal switching control unit 31, and the signal switching control unit 31 generates a switching signal for modulation when it receives the flag signal from the modulation unit 36. The signal switching control unit 31 then outputs the switching signal for modulation to the transmission parameter switching unit 32-3. In other words, the signal switching control unit 31 generates and outputs a switching signal for modulation when the multiplexed signal input by the modulation unit 36 ​​has reached a preset data amount. 【0128】 The transmission parameter switching unit 32-1 receives coding rates P1-1,..., and P1-N corresponding to the transmitted data SD-1,...,SD-N, and also receives a switching signal for error correction coding from the signal switching control unit 31. Based on the switching signal for error correction coding, the transmission parameter switching unit 32-1 selects one of the coding rates P1-1,..., and P1-N and outputs the selected coding rate P1 to the error correction coding unit 34. 【0129】 The coding rate P1 output from the transmission parameter switching unit 32-1 to the error correction coding unit 34 is used for the transmission data SD at the timing when the error correction coding unit 34 processes it, among the transmission data SD-1, ..., SD-N included in the multiplexed data input to the error correction coding unit 34. 【0130】 For example, if the coding rate P1 output from the transmission parameter switching unit 32-1 to the error correction coding unit 34 is coding rate P1-1, then it is time for the error correction coding unit 34 to process the transmission data SD-1 included in the multiplexed data. In this case, the error correction coding unit 34 performs error correction coding on the transmission data SD-1 included in the multiplexed data using coding rate P1-1. 【0131】 The transmission parameter switching unit 32-2 receives time interleave lengths P2-1,...,P2-N corresponding to the transmission data SD-1,...,SD-N, and also receives a switching signal for time interleaving from the signal switching control unit 31. Based on the switching signal for time interleaving, the transmission parameter switching unit 32-2 selects one of the time interleave lengths P2-1,...,P2-N and outputs the selected time interleave length P2 to the time interleaving processing unit 35. 【0132】 The time interleave length P2 output from the transmission parameter switching unit 32-2 to the time interleave processing unit 35 is used for the signal corresponding to the transmission data SD at the timing when the time interleave processing unit 35 processes it, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the error-corrected encoded multiplexed signal input to the time interleave processing unit 35. 【0133】 For example, if the time interleave length P2 output from the transmission parameter switching unit 32-2 to the time interleave processing unit 35 is time interleave length P2-1, then the time interleave processing unit 35 is at the timing to process the signal corresponding to the transmission data SD-1 included in the multiplexed signal. In this case, the time interleave processing unit 35 performs time interleave processing on the signal corresponding to the transmission data SD-1 included in the multiplexed signal using the time interleave length P2-1. 【0134】 The transmission parameter switching unit 32-3 receives the modulation bit counts P3-1,..., and P3-N corresponding to the transmission data SD-1,...,SD-N, and also receives a modulation switching signal from the signal switching control unit 31. Based on the modulation switching signal, the transmission parameter switching unit 32-3 selects one of the modulation bit counts P3-1,..., and P3-N and outputs the selected modulation bit count P3 to the modulation unit 36. 【0135】 The modulation bit count P3 output from the transmission parameter switching unit 32-3 to the modulation unit 36 ​​is used for the signal corresponding to the transmission data SD at the timing when the modulation unit 36 ​​processes it, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the multiplexed signal after time interleaving processing input to the modulation unit 36. 【0136】 For example, if the number of modulation bits P3 output from the transmission parameter switching unit 32-3 to the modulation unit 36 ​​is P3-1, then the modulation unit 36 ​​is at the timing to process the signal corresponding to the transmission data SD-1 included in the multiplexed signal. In this case, the modulation unit 36 ​​modulates the signal corresponding to the transmission data SD-1 included in the multiplexed signal using a predetermined modulation scheme with a number of modulation bits P3-1. 【0137】 The multiplexing unit 33 receives the transmission data SD-1, ..., SD-N as input, and also receives a switching signal for multiplexing from the signal switching control unit 31. The multiplexing unit 33 then switches these input data using a switch based on the switching signal for multiplexing, performing TDM multiplexing on these data, and outputs the multiplexed data to the error correction coding unit 34. This generates multiplexed data in which each of the transmission data SD-1, ..., SD-N is arranged in chronological order. 【0138】 The error correction coding unit 34 receives multiplexed data from the multiplexing unit 33 and the coding rate P1 from the transmission parameter switching unit 32-1. The error correction coding unit 34 then performs error correction coding on the transmission data SD at the current timing from among the transmission data SD-1, ..., SD-N included in the input multiplexed data, using the coding rate P1, and outputs the multiplexed signal after error correction coding to the time interleaving processing unit 35. 【0139】 As mentioned above, the coding rate P1 is the data selected according to the switching signal for error correction coding output from the signal switching control unit 31. Therefore, the transmission data SD that the error correction coding unit 34 processes at the current timing corresponds to the coding rate P1 input from the transmission parameter switching unit 32-1. 【0140】 The time interleaving processing unit 35 receives the error-corrected encoded multiplexed signal from the error-corrected encoding unit 34 and the time interleaving length P2 from the transmission parameter switching unit 32-2. The time interleaving processing unit 35 then performs time interleaving processing on the signal corresponding to the transmission data SD at the current timing, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the input multiplexed signal, using the time interleaving length P2, and outputs the multiplexed signal after time interleaving processing to the modulation unit 36. 【0141】 As mentioned above, the time interleave length P2 is data selected according to the time interleave switching signal output from the signal switching control unit 31. Therefore, the signal corresponding to the transmission data SD that the time interleave processing unit 35 processes at the current timing corresponds to the time interleave length P2 input from the transmission parameter switching unit 32-2. 【0142】 The modulation unit 36 ​​receives the multiplexed signal after time interleaving processing from the time interleaving processing unit 35, and also receives the modulation bit count P3 from the transmission parameter switching unit 32-3. The modulation unit 36 ​​then modulates the signal corresponding to the transmission data SD at the current timing from among the signals corresponding to the transmission data SD-1, ..., SD-N included in the input multiplexed signal, using a predetermined modulation scheme with modulation bit count P3, and outputs the modulated multiplexed signal to the transmission weight multiplication unit 37. 【0143】 As mentioned above, the modulation bit depth P3 is data selected according to the modulation switching signal output from the signal switching control unit 31. Therefore, the signal corresponding to the transmission data SD that the modulation unit 36 ​​processes at the current timing corresponds to the modulation bit depth P3 input from the transmission parameter switching unit 32-3. 【0144】 The transmit weight multiplier unit 37 receives the modulated multiplexed signal from the modulation unit 36, as well as the transmit weight SW calculated by the receiving device 4 shown in Figure 5 (described later). The unit multiplies the multiplexed signal by the transmit weight SW and outputs the multiplied multiplexed signal to the UL frame constructor 38. As a result, the same transmit weight SW is multiplied by each of the signals corresponding to the transmit data SD-1, ..., SD-N included in the multiplexed signal. 【0145】 The UL frame constructor 38 receives the multiplied multiplexed signal from the transmit weight multiplier unit 37 and modulates the multiplied multiplexed signal to generate a signal that can be transmitted wirelessly. The UL frame constructor 38 then constructs a UL frame by arranging the OFDM symbols corresponding to the transmit data SD-1, ..., SD-N sequentially in the time direction, with the OFDM symbols as the unit. The UL frame constructor 38 then transmits the transmit signal S of the UL frame to the receiver 4 using the MIMO method. 【0146】 As described above, according to the transmitting device 3 of Embodiment 2, the signal switching control unit 31 generates a switching signal for multiplexing indicating the switching timing, a switching signal for error correction coding, a switching signal for time interleaving, and a switching signal for modulation, based on the amount of data or signal input by the multiplexing unit 33, etc. 【0147】 The transmission parameter switching units 32-1, 32-2, and 32-3 select one coding rate P1 from among coding rate P1-1, ..., P1-N, one time interleave length P2 from among time interleave length P2-1, ..., P2-N, and one modulation bit count P3 from among modulation bit count P3-1, ..., P3-N, respectively, based on the switching signal for error correction coding, the switching signal for time interleave, and the switching signal for modulation. 【0148】 The multiplexing unit 33 receives multiple transmission data SD-1, ..., SD-N with different combinations of transmission parameters, and performs TDM multiplexing on them based on a switching signal for multiplexing. 【0149】 The error correction coding unit 34 performs error correction coding on the signal at the current timing included in the multiplexed signal using coding rate P1, and the time interleaving processing unit 35 performs time interleaving on the signal at the current timing included in the multiplexed signal after error correction coding using time interleaving length P2. Then, the modulation unit 36 ​​modulates the signal at the current timing included in the multiplexed signal after time interleaving processing using a predetermined modulation scheme with modulation bit count P3. 【0150】 The transmit weight multiplication unit 37 multiplies the modulated multiplexed signal by the transmit weight SW. The UL frame constructor 38 modulates the multiplied multiplexed signal to construct an UL frame and transmits the UL frame's transmit signal S using the MIMO method. 【0151】 As a result, in an SVD-MIMO transmission system conforming to the standard of Non-Patent Document 1 mentioned above, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted simultaneously using the TDM method, the transmission timing of the transmitted data SD-1,...,SD-N is divided in the time direction. Therefore, the N systems of the error correction coding units 11-1,...,11-N, the time interleaving processing units 12-1,...,12-N, and the modulation units 13-1,...,13-N shown in Figure 1 can each be consolidated into one system. 【0152】 Therefore, in an SVD-MIMO transmission system, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted using the TDM method, the increase in circuit size can be suppressed. 【0153】 (Receiving device / Example 2) Next, the receiving device of Example 2 will be described. Figure 5 is a block diagram showing an example configuration of the receiving device of Example 2. 【0154】 This receiving device 4 is a wireless transmission device on the base station side and includes a UL frame analysis unit 41, a received weight multiplication unit 42, a signal switching control unit 43, a transmission parameter switching unit (transmission parameter switching unit for demodulation) 44-1, a transmission parameter switching unit (transmission parameter switching unit for time deinterleaving) 44-2, a transmission parameter switching unit (transmission parameter switching unit for error correction decoding) 44-3, a demodulation unit 45, a time deinterleaving processing unit 46, an error correction decoding unit 47, and a multiplexing / decoupling unit 48. 【0155】 The receiving device 4 receives the received signal R of the UL frame corresponding to the transmitted signal S of the UL frame transmitted by the transmitting device 3 shown in Figure 4 using the MIMO method, multiplies the received multiplexed signal by the received weight RW, performs receiving processing such as demodulation while switching transmission parameters, performs multiplexing and separation using the TDM method on the multiplexed signal after receiving processing, and outputs multiple received data RD-1,...,RD-N corresponding to multiple transmitted data SD-1,...,SD-N with different combinations of transmission parameters. 【0156】 The modulation bit counts P3-1, ..., P3-N are transmission parameters used when the demodulation unit 45 processes the signals corresponding to the transmitted data SD-1, ..., SD-N, with one of these being selected by the transmission parameter switching unit 44-1. 【0157】 The time interleave lengths P2-1, ..., P2-N are transmission parameters selected by the transmission parameter switching unit 44-2 and used by the time deinterleave processing unit 46 when processing the signals corresponding to the transmitted data SD-1, ..., SD-N. 【0158】 The coding rates P1-1,...,P1-N are transmission parameters selected by the transmission parameter switching unit 44-3, and are used when the error correction decoding unit 47 processes the signals corresponding to the transmitted data SD-1,...,SD-N. 【0159】 The received weight RW is a transmission parameter that is multiplied by the multiplexed signal (described later) by the received weight multiplier unit 42, and is calculated by the receiving device 4. These transmission parameters are the same as those in the above-described embodiment 1. 【0160】 The UL frame analysis unit 41 receives the received signal R of the UL frame using the MIMO method, performs synchronization processing on the received signal R to detect the beginning of the UL frame and OFDM symbols, and reads out the OFDM symbols from the UL frame, arranged in time direction as OFDM symbols. The UL frame analysis unit 41 then outputs the multiplexed signal of OFDM symbols to the received weight multiplication unit 42. 【0161】 The receive weight multiplication unit 42 receives the multiplexed signal from the UL frame analysis unit 41 and the receive weight RW calculated by the receiving device 4, multiplies the multiplexed signal by the receive weight RW, and outputs the multiplied multiplexed signal to the demodulation unit 45. As a result, the same receive weight RW is multiplied for each signal corresponding to the transmission data SD-1, ..., SD-N included in the multiplexed signal. 【0162】 The signal switching control unit 43 generates switching signals to control the switching timing so that the demodulation unit 45, time deinterleaving processing unit 46, error correction decoding unit 47, and multiplexing / decoupling unit 48 can process each of the signals corresponding to the transmission data SD-1, ..., SD-N included in the multiplexed signal. 【0163】 Specifically, the signal switching control unit 43 generates a demodulation switching signal to select one of the modulation bit counts P3-1,...,P3-N to be applied to the signal of the transmitted data SD-1,...,SD-N at the timing of the signal corresponding to the transmitted data SD-1,...,SD-N included in the multiplied multiplexed signal input to the demodulation unit 45 from the receive weight multiplication unit 42, in accordance with the timing of the signal. 【0164】 For example, the signal switching control unit 43 generates a demodulation switching signal for the multiplied multiplexed signal input to the demodulation unit 45 from the receive weight multiplication unit 42, based on a preset data amount (the amount of data to be demodulated for each signal corresponding to the transmitted data SD-1, ..., SD-N). Specifically, when the demodulation unit 45 detects that the input multiplexed signal has reached a preset data amount, it outputs a flag signal to the signal switching control unit 43, and the signal switching control unit 43 generates a demodulation switching signal when it receives the flag signal from the demodulation unit 45. The signal switching control unit 43 then outputs the demodulation switching signal to the transmission parameter switching unit 44-1. In other words, the signal switching control unit 43 generates and outputs a demodulation switching signal when the multiplexed signal input to the demodulation unit 45 has reached a preset data amount. 【0165】 Furthermore, the signal switching control unit 43 generates a switching signal for time deinterleaving to select one of the time interleaving lengths P2-1,...,P2-N to be applied to the signals of the transmitted data SD-1,...,SD-N included in the demodulated multiplexed signal input by the time deinterleaving processing unit 46 from the demodulation unit 45, in accordance with the timing of the signals. 【0166】 For example, the signal switching control unit 43 generates a switching signal for time deinterleaving based on a preset amount of data (the amount of data for which time deinterleaving processing is performed for each signal corresponding to the transmission data SD-1, ..., SD-N) for the multiplexed signals input by the time deinterleaving processing unit 46 from the demodulation unit 45. Specifically, when the time deinterleaving processing unit 46 detects that the input multiplexed signals have reached a preset amount of data, it outputs a flag signal to the signal switching control unit 43, and the signal switching control unit 43 generates a switching signal for time deinterleaving when it receives the flag signal from the time deinterleaving processing unit 46. The signal switching control unit 43 then outputs the switching signal for time deinterleaving to the transmission parameter switching unit 44-2. In other words, the signal switching control unit 43 generates and outputs a switching signal for time deinterleaving when the multiplexed signals input by the time deinterleaving processing unit 46 have reached a preset amount of data. 【0167】 Furthermore, the signal switching control unit 43 generates a switching signal for error correction decoding to select one of the coding rates P1-1,...,P1-N to be applied to the signal of the transmitted data SD-1,...,SD-N at the timing of the signal corresponding to the transmitted data SD-1,...,SD-N included in the multiplexed signal after time deinterleaving processing input from the time deinterleaving processing unit 46 to the error correction decoding unit 47. 【0168】 For example, the signal switching control unit 43 generates a switching signal for error correction and decoding based on a preset data amount (the amount of data for which error correction and decoding is performed for each signal corresponding to the transmission data SD-1, ..., SD-N) for the multiplexed signal input to the error correction and decoding unit 47 from the time deinterleaving processing unit 46. Specifically, when the error correction and decoding unit 47 detects that the input multiplexed signal has reached a preset data amount, it outputs a flag signal to the signal switching control unit 43, and the signal switching control unit 43 generates a switching signal for error correction and decoding when it receives the flag signal from the error correction and decoding unit 47. The signal switching control unit 43 then outputs the switching signal for error correction and decoding to the transmission parameter switching unit 44-3. In other words, the signal switching control unit 43 generates and outputs a switching signal for error correction and decoding when the multiplexed signal input to the error correction and decoding unit 47 has reached a preset data amount. 【0169】 Furthermore, the signal switching control unit 43 generates a switching signal for multiplex separation to control the timing of switching the received data RD-1, ..., RD-N, which are separated from the multiplex signal, so that the multiplex signal is output to the appropriate output destination. 【0170】 For example, the signal switching control unit 43 generates a switching signal for multiplexing based on a preset data amount (the amount of signal corresponding to the transmitted data SD-1, ..., SD-N) for the multiplexed signal after error correction decoding input to the multiplexing / decoding unit 48. Specifically, when the multiplexing / decoding unit 48 detects that the input multiplexed signal has reached a preset data amount, it outputs a flag signal to the signal switching control unit 43, and the signal switching control unit 43 generates a switching signal for multiplexing when it receives the flag signal from the multiplexing / decoding unit 48. Then, the signal switching control unit 43 outputs the switching signal for multiplexing / decoding to the multiplexing / decoding unit 48. In other words, the signal switching control unit 43 generates and outputs a switching signal for multiplexing / decoding when the multiplexed signal input to the multiplexing / decoding unit 48 has reached a preset data amount. 【0171】 The transmission parameter switching unit 44-1 receives the modulation bit counts P3-1,..., and P3-N corresponding to the transmission data SD-1,...,SD-N, and also receives a demodulation switching signal from the signal switching control unit 43. Based on the demodulation switching signal, the transmission parameter switching unit 44-1 selects one of the modulation bit counts P3-1,..., and P3-N and outputs the selected modulation bit count P3 to the demodulation unit 45. 【0172】 The modulation bit count P3 output from the transmission parameter switching unit 44-1 to the demodulation unit 45 is used for the signal corresponding to the transmission data SD at the timing when the demodulation unit 45 processes it, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the multiplied multiplexed signal input to the demodulation unit 45. 【0173】 For example, if the number of modulation bits P3 output from the transmission parameter switching unit 44-1 to the demodulation unit 45 is P3-1, then the demodulation unit 45 is at the timing to process the signal corresponding to the transmission data SD-1 included in the multiplexed signal. In this case, the demodulation unit 45 demodulates the signal corresponding to the transmission data SD-1 included in the multiplexed signal using a predetermined modulation scheme with a number of modulation bits P3-1. 【0174】 The transmission parameter switching unit 44-2 receives time interleave lengths P2-1,...,P2-N corresponding to the transmission data SD-1,...,SD-N, and also receives a switching signal for time deinterleaving from the signal switching control unit 43. Based on the switching signal for time deinterleaving, the transmission parameter switching unit 44-2 selects one of the time interleave lengths P2-1,...,P2-N and outputs the selected time interleave length P2 to the time deinterleaving processing unit 46. 【0175】 The time interleave length P2 output from the transmission parameter switching unit 44-2 to the time deinterleaving processing unit 46 is used for the signal corresponding to the transmission data SD at the timing when the time deinterleaving processing unit 46 processes it, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the demodulated multiplexed signal input to the time deinterleaving processing unit 46. 【0176】 For example, if the time interleave length P2 output from the transmission parameter switching unit 44-2 to the time deinterleave processing unit 46 is time interleave length P2-1, then the time deinterleave processing unit 46 is at the timing to process the signal corresponding to the transmission data SD-1 included in the multiplexed signal. In this case, the time deinterleave processing unit 46 performs time deinterleave processing on the signal corresponding to the transmission data SD-1 included in the multiplexed signal using the time interleave length P2-1. 【0177】 The transmission parameter switching unit 44-3 receives coding rates P1-1,..., and P1-N corresponding to the transmitted data SD-1,...,SD-N, and also receives a switching signal for error correction decoding from the signal switching control unit 43. Based on the switching signal for error correction decoding, the transmission parameter switching unit 44-3 selects one of the coding rates P1-1,..., and P1-N and outputs the selected coding rate P1 to the error correction decoding unit 47. 【0178】 The coding rate P1 output from the transmission parameter switching unit 44-3 to the error correction decoding unit 47 is used for the signal corresponding to the transmission data SD at the timing when the error correction decoding unit 47 processes the transmission data SD, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the multiplexed signal input to the error correction decoding unit 47. 【0179】 For example, if the coding rate P1 output from the transmission parameter switching unit 44-3 to the error correction decoding unit 47 is coding rate P1-1, then the error correction decoding unit 47 is at the timing to process the signal corresponding to the transmission data SD-1 included in the multiplexed signal. In this case, the error correction decoding unit 47 performs error correction decoding on the signal corresponding to the transmission data SD-1 included in the multiplexed signal using coding rate P1-1. 【0180】 The demodulation unit 45 receives the multiplied multiplexed signal from the receive weight multiplication unit 42 and the modulation bit count P3 from the transmission parameter switching unit 44-1. The demodulation unit 45 then demodulates the signal corresponding to the transmission data SD at the current timing from among the signals corresponding to the transmission data SD-1, ..., SD-N included in the input multiplexed signal, using a predetermined modulation scheme with modulation bit count P3, and outputs the demodulated multiplexed signal to the time deinterleaving processing unit 46. 【0181】 As mentioned above, the modulation bit depth P3 is data selected according to the demodulation switching signal output from the signal switching control unit 43. Therefore, the signal corresponding to the transmission data SD that the demodulation unit 45 processes at the current timing corresponds to the modulation bit depth P3 input from the transmission parameter switching unit 44-1. 【0182】 The time deinterleaving processing unit 46 receives the demodulated multiplexed signal from the demodulation unit 45 and the time interleaving length P2 from the transmission parameter switching unit 44-2. The time deinterleaving processing unit 46 then performs time deinterleaving processing on the signal corresponding to the transmission data SD at the current timing, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the input multiplexed signal, using the time interleaving length P2, and outputs the multiplexed signal after time deinterleaving processing to the error correction decoding unit 47. 【0183】 As mentioned above, the time interleave length P2 is data selected according to the switching signal for time deinterleaving output from the signal switching control unit 43. Therefore, the signal corresponding to the transmission data SD that the time deinterleaving processing unit 46 processes at the current timing corresponds to the time interleave length P2 input from the transmission parameter switching unit 44-2. 【0184】 The error correction decoding unit 47 receives the multiplexed signal after time deinterleaving processing from the time deinterleaving processing unit 46, and also receives the coding rate P1 from the transmission parameter switching unit 44-3. The error correction decoding unit 47 then performs error correction decoding using the coding rate P1 on the signal corresponding to the transmission data SD at the current timing, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the input multiplexed signal, and outputs the multiplexed signal after error correction decoding to the multiplex separation unit 48. 【0185】 As described above, the coding rate P1 is the data selected according to the error correction decoding switching signal output from the signal switching control unit 43. Therefore, the signal corresponding to the transmission data SD that the error correction decoding unit 47 processes at the current timing corresponds to the coding rate P1 input from the transmission parameter switching unit 44-3. 【0186】 The multiplexing / decoding unit 48 receives the multiplexed signal after error correction and decoding from the error correction and decoding unit 47, and also receives a switching signal for multiplexing / decoding from the signal switching control unit 43. The multiplexing / decoding unit 48 then performs TDM-type multiplexing / decoding on the multiplexed signal by switching the multiplexed signal using a switch based on the switching signal for multiplexing / decoding. As a result, the multiplexed signal input from the error correction and decoding unit 47 is sequentially separated into received data RD-1, ..., corresponding to transmitted data SD-1, and received data RD-N corresponding to transmitted data SD-N. The multiplexing / decoding unit 48 then outputs the received data RD-1, ..., RD-N. 【0187】 As described above, according to the receiving device 4 of Embodiment 2, the UL frame analysis unit 41 receives the UL frame reception signal R from the transmitting device 3 in the MIMO method and reads out OFDM symbols from the UL frame. The reception weight multiplication unit 42 multiplies the multiplexed signal of OFDM symbols by the reception weight RW. 【0188】 The signal switching control unit 43 generates a switching signal for demodulation, a switching signal for time deinterleaving, a switching signal for error correction decoding, and a switching signal for multiplex separation, based on the amount of data of the multiplexed signals input by the demodulation unit 45 and the like. 【0189】 The transmission parameter switching units 44-1, 44-2, and 44-3 select one modulation bit number P3 from among modulation bit number P3-1, ..., P3-N, one time interleave length P2 from among time interleave length P2-1, ..., P2-N, and one coding rate P1 from among coding rate P1-1, ..., P1-N, respectively, based on the switching signal for demodulation, the switching signal for time deinterleave, and the switching signal for error correction decoding. 【0190】 The demodulation unit 45 demodulates the signal at the current timing included in the multiplied multiplexed signal using a predetermined modulation scheme with a modulation bit count P3. The time deinterleaving processing unit 46 performs time deinterleaving on the signal at the current timing included in the demodulated multiplexed signal using a time interleaving length P2. Then, the error correction decoding unit 47 performs error correction decoding on the signal at the current timing included in the multiplexed signal after time deinterleaving using a coding rate P1. 【0191】 The multiplexing unit 48 performs TDM-based multiplexing on the multiplexed signals after error correction coding and outputs the received data RD-1, ..., RD-N. 【0192】 As a result, in an SVD-MIMO transmission system conforming to the standard of Non-Patent Document 1 mentioned above, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted simultaneously using the TDM method, the transmission timing of the transmitted data SD-1,...,SD-N is divided in the time direction, and the received signal R containing the transmitted data SD-1,...,SD-N is received in this divided order. Therefore, the N systems of the demodulation units 24-1,...,24-N, the time deinterleaving processing units 25-1,...,25-N, and the error correction decoding units 26-1,...,26-N shown in Figure 2 can each be consolidated into one system. 【0193】 Therefore, in an SVD-MIMO transmission system, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted using the TDM method, the increase in circuit size can be suppressed. 【0194】 [Example 3] Next, we will describe Example 3. As mentioned above, the transmission system of Example 3 is an improved version of the transmission system of Example 2, in which the power distribution processing unit on the transmitting side and the power distribution processing unit on the receiving side are each consolidated into one unit. 【0195】 The standard described in Non-Patent Document 1 above performs a process of individually setting power values ​​for virtual transmission paths formed using the SVD-MIMO method. The combination of power values ​​assigned to the virtual transmission path differs for each transmitted data, but the components can be aggregated, similar to error correction coding. 【0196】 Therefore, in Example 3, a power distribution processing unit is provided after the error correction coding unit 34, time interleaving processing unit 35, and modulation unit 36 ​​in Example 2. In addition to the transmission processing of error correction coding, time interleaving processing, and modulation, power distribution processing is performed while switching the transmission parameters corresponding to the transmitted data SD-1, ..., SD-N, and the N power distribution processing units are consolidated into one. This makes it possible to suppress an increase in the circuit size. 【0197】 (Transmitter / Example 3) The transmitting device of Example 3 will now be described. Figure 6 is a block diagram showing an example configuration of the transmitting device of Example 3. 【0198】 This transmitting device 5 is a wireless transmission device on the mobile station side and includes a signal switching control unit 51, transmission parameter switching units 32-1, 32-2, 32-3, a transmission parameter switching unit (power distribution transmission parameter switching unit) 52, a multiplexing unit 33, an error correction coding unit 34, a time interleaving processing unit 35, a modulation unit 36, a power distribution processing unit 53, a transmission weight multiplication unit 37, and a UL frame configuration unit 38. 【0199】 Comparing the transmitter 3 of Embodiment 2 shown in Figure 4 with the transmitter 5 of this Embodiment 3, both transmitters 3 and 5 share the features of having transmission parameter switching units 32-1, 32-2, 32-3, a multiplexing unit 33, an error correction coding unit 34, a time interleaving processing unit 35, a modulation unit 36, a transmission weight multiplication unit 37, and a UL frame configuration unit 38. 【0200】 On the other hand, the transmitting device 5 differs from the transmitting device 3 in that it has a signal switching control unit 51 that is different from the signal switching control unit 31, and also has a transmission parameter switching unit 52 and a power distribution processing unit 53. 【0201】 In Figure 6, parts common to Figure 4 are denoted by the same reference numerals as in Figure 4, and their detailed explanations are omitted. Furthermore, the transmission signal S of the UL frame transmitted from the transmitting device 5 is transmitted to the receiving device 6 shown in Figure 7, which will be described later, using the MIMO method. In other words, the transmission system of Embodiment 3 is configured to include the transmitting device 5 and the receiving device 6 shown in Figure 7. 【0202】 Transmitter 5 receives multiple transmission data SD-1, ..., SD-N with different combinations of transmission parameters, performs TDM multiplexing on these data, performs transmission processing such as error correction coding and power distribution processing on the multiplexed data while switching transmission parameters, multiplies the multiplexed signal after power distribution processing by the transmission weight SW, and transmits the UL frame transmission signal S to receiver 6 shown in Figure 7, which will be described later, using the MIMO method. 【0203】 The transmission parameters for coding rates P1-1,···,P1-N, time interleave lengths P2-1,···,P2-N, modulation bit counts P3-1,···,P3-N, and transmit weight SW are the same as in Example 2. 【0204】 Power distribution parameters P4-1, ..., P4-N are transmission parameters used by the power distribution processing unit 53 when performing power distribution processing on the modulated multiplexed signal. These parameters are calculated by the receiving device 6 shown in Figure 7 (described later), transmitted from the receiving device 6 to the transmitting device 5 in DL frames, and held by the transmitting device 5. 【0205】 The signal switching control unit 51 performs the same processing as the signal switching control unit 31 shown in Figure 4. Furthermore, the power distribution processing unit 53 generates a switching signal to control the switching timing in order to process each of the signals corresponding to the transmission data SD-1, ..., SD-N included in the multiplexed signal. 【0206】 Specifically, the signal switching control unit 51 generates and outputs the aforementioned switching signals for multiplexing, switching signals for error correction coding, switching signals for time interleaving, and switching signals for modulation. Furthermore, the signal switching control unit 51 generates a switching signal for power distribution to select one of the power distributions P4-1,..., P4-N to be applied to the signal corresponding to the transmitted data SD-1,..., SD-N included in the modulated multiplexed signal input from the modulation unit 36 ​​to the power distribution processing unit 53, in accordance with the timing of the signal. 【0207】 For example, the signal switching control unit 51 generates a switching signal for power distribution based on a preset data amount (the amount of data for which power is distributed for each signal corresponding to the transmitted data SD-1, ..., SD-N) for the modulated multiplexed signal input from the modulation unit 36 ​​to the power distribution processing unit 53. Specifically, when the power distribution processing unit 53 detects that the input multiplexed signal has reached a preset data amount, it outputs a flag signal to the signal switching control unit 51, and the signal switching control unit 51 generates a switching signal for power distribution when it receives the flag signal from the power distribution processing unit 53. The signal switching control unit 51 then outputs the switching signal for power distribution to the transmission parameter switching unit 52. In other words, the signal switching control unit 51 generates and outputs a switching signal for power distribution when the multiplexed signal input by the power distribution processing unit 53 has reached a preset data amount. 【0208】 The transmission parameter switching unit 52 receives power distributions P4-1, ..., P4-N corresponding to the transmission data SD-1, ..., SD-N, and also receives a switching signal for power distribution from the signal switching control unit 51. Based on the switching signal for power distribution, the transmission parameter switching unit 52 selects one of the power distributions P4-1, ..., P4-N and outputs the selected power distribution P4 to the power distribution processing unit 53. 【0209】 The power distribution P4 output from the transmission parameter switching unit 52 to the power distribution processing unit 53 is used for the signal corresponding to the transmission data SD at the timing when the power distribution processing unit 53 processes the multiplexed signal input to the power distribution processing unit 53, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the multiplexed signal input to the power distribution processing unit 53. 【0210】 For example, if the power distribution P4 output from the transmission parameter switching unit 52 to the power distribution processing unit 53 is power distribution P4-1, then the power distribution processing unit 53 is at the timing to process the signal corresponding to the transmission data SD-1 included in the multiplexed signal. In this case, the power distribution processing unit 53 performs power distribution processing on the signal corresponding to the transmission data SD-1 included in the multiplexed signal using power distribution P4-1. 【0211】 The modulation unit 36 ​​outputs the modulated multiplexed signal to the power distribution processing unit 53. The power distribution processing unit 53 receives the modulated multiplexed signal from the modulation unit 36 ​​and also receives the power distribution P4 from the transmission parameter switching unit 52. The power distribution processing unit 53 then multiplies the signal corresponding to the transmission data SD at the current timing from the signals corresponding to the transmission data SD-1, ..., SD-N included in the input multiplexed signal by the weight indicated by the power distribution P4, thereby performing power distribution processing for each virtual transmission path of the intrinsic mode using the SVD-MIMO method, and outputs the multiplexed signal after power distribution processing to the transmission weight multiplication unit 37. 【0212】 As mentioned above, power distribution P4 is data selected according to the power distribution switching signal output from the signal switching control unit 51. Therefore, the signal corresponding to the transmission data SD that the power distribution processing unit 53 processes at the current timing corresponds to the power distribution P4 input from the transmission parameter switching unit 52. 【0213】 The transmit weight multiplication unit 37 receives the multiplexed signal after power distribution processing from the power distribution processing unit 53, as well as the transmit weight SW calculated by the receiving device 6, and performs the aforementioned processing. Then, the UL frame configuration unit 38 transmits the UL frame transmit signal S to the receiving device 6 using the MIMO method. 【0214】 As described above, according to the transmitting device 5 of Embodiment 3, the signal switching control unit 51 generates a switching signal for multiplexing indicating the switching timing, a switching signal for error correction coding, a switching signal for time interleaving, a switching signal for modulation, and a switching signal for power distribution, based on the amount of data or signal input by the multiplexing unit 33, etc. 【0215】 The transmission parameter switching units 32-1, 32-2, 32-3, and 52 select one coding rate P1 from among coding rate P1-1, ..., P1-N, one time interleave length P2 from among time interleave length P2-1, ..., P2-N, one modulation bit count P3 from among modulation bit count P3-1, ..., P3-N, and one power distribution P4 from among power distribution P4-1, ..., P4-N, respectively, based on the switching signal for error correction coding, the switching signal for time interleave, the switching signal for modulation, and the switching signal for power distribution. 【0216】 The multiplexing unit 33 receives multiple transmission data SD-1, ..., SD-N with different combinations of transmission parameters, and performs TDM multiplexing on them based on a switching signal for multiplexing. 【0217】 The error correction coding unit 34 performs error correction coding on the multiplexed signal using a coding rate P1, and the time interleaving processing unit 35 performs time interleaving processing on the current timing signal included in the multiplexed signal after error correction coding using a time interleaving length P2. Then, the modulation unit 36 ​​modulates the current timing signal included in the multiplexed signal after time interleaving processing using a predetermined modulation scheme with a modulation bit count P3, and the power distribution processing unit 53 performs power distribution processing on the current timing signal included in the modulated multiplexed signal using power distribution P4. 【0218】 The transmit weight multiplication unit 37 multiplies the multiplexed signal after power distribution processing by the transmit weight SW. The UL frame constructor 38 modulates the multiplied multiplexed signal to construct an UL frame and transmits the transmit signal S of the UL frame using the MIMO method. 【0219】 As a result, in an SVD-MIMO transmission system conforming to the standard of Non-Patent Document 1 mentioned above, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted simultaneously using the TDM method, the transmission timing of the transmitted data SD-1, ..., SD-N is divided in the time direction, so the error correction coding unit 34, the time interleaving processing unit 35, the modulation unit 36, and the power distribution processing unit 53 can each be consolidated into one unit. 【0220】 Therefore, in an SVD-MIMO transmission system, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted using the TDM method, the increase in circuit size can be suppressed. 【0221】 (Receiving device / Example 3) Next, the receiving device of Example 3 will be described. Figure 7 is a block diagram showing an example configuration of the receiving device of Example 3. 【0222】 This receiving device 6 is a wireless transmission device on the base station side and includes a UL frame analysis unit 41, a received weight multiplication unit 42, a signal switching control unit 61, a transmission parameter switching unit (power distribution transmission parameter switching unit) 62, transmission parameter switching units 44-1, 44-2, 44-3, a power distribution processing unit 63, a demodulation unit 45, a time deinterleaving processing unit 46, an error correction decoding unit 47, and a multiplexing / decoupling unit 48. 【0223】 Comparing the receiver 4 of Embodiment 2 shown in Figure 5 with the receiver 6 of this Embodiment 3, both receivers 4 and 6 are similar in that they include a UL frame analysis unit 41, a reception weight multiplication unit 42, transmission parameter switching units 44-1, 44-2, 44-3, a demodulation unit 45, a time deinterleaving processing unit 46, an error correction decoding unit 47, and a multiplexing / separation unit 48. 【0224】 On the other hand, the receiving device 6 differs from the receiving device 4 in that it has a signal switching control unit 61 that is different from the signal switching control unit 43, and further includes a transmission parameter switching unit 62 and a power distribution processing unit 63. 【0225】 In Figure 7, parts common to Figure 5 are denoted by the same reference numerals as in Figure 5, and their detailed explanations are omitted. 【0226】 The receiving device 6 receives the received signal R of the UL frame corresponding to the transmitted signal S of the UL frame transmitted by the transmitting device 5 shown in Figure 6 using the MIMO method, multiplies the received multiplexed signal by the received weight RW, performs receiving processing such as power distribution processing while switching transmission parameters, performs TDM multiplexing on the multiplexed signal after receiving processing, and outputs multiple received data RD-1,...,RD-N corresponding to multiple transmitted data SD-1,...,SD-N with different combinations of transmission parameters. 【0227】 The transmission parameters, including coding rates P1-1,···,P1-N, time interleave lengths P2-1,···,P2-N, modulation bit counts P3-1,···,P3-N, and receive weight RW, are the same as in Example 2. 【0228】 Power distribution parameters P4-1, ..., P4-N are transmission parameters used by the power distribution processing unit 63 when performing power distribution processing on the multiplied multiplexed signal, and are calculated by the receiving device 6. 【0229】 The signal switching control unit 61 performs the same processing as the signal switching control unit 43 shown in Figure 5. Furthermore, the power distribution processing unit 63 generates a switching signal to control the switching timing in order to process each of the signals corresponding to the transmission data SD-1, ..., SD-N included in the multiplexed signal. 【0230】 Specifically, the signal switching control unit 61 generates and outputs the aforementioned switching signals for demodulation, time deinterleaving, error correction decoding, and multiplexing. Furthermore, the signal switching control unit 61 generates a power distribution switching signal to select one of the power distributions P4-1,..., P4-N to be applied to the signal corresponding to the transmitted data SD-1,..., SD-N included in the multiplied multiplexed signal input by the power distribution processing unit 63 from the receive weight multiplication unit 42, in accordance with the timing of the signals. 【0231】 For example, the signal switching control unit 61 generates a switching signal for power distribution based on a preset data amount (the amount of data for which power is distributed for each signal corresponding to the transmitted data SD-1, ..., SD-N) for the multiplied multiplexed signal input by the power distribution processing unit 63 from the receive weight multiplication unit 42. Specifically, when the power distribution processing unit 63 detects that the input multiplexed signal has reached a preset data amount, it outputs a flag signal to the signal switching control unit 61, and the signal switching control unit 61 generates a switching signal for power distribution when it receives the flag signal from the power distribution processing unit 63. Then, the signal switching control unit 61 outputs the switching signal for power distribution to the transmission parameter switching unit 62. In other words, the signal switching control unit 61 generates and outputs a switching signal for power distribution when the multiplexed signal input by the power distribution processing unit 63 has reached a preset data amount. 【0232】 The transmission parameter switching unit 62 receives power distributions P4-1, ..., P4-N corresponding to the transmission data SD-1, ..., SD-N, and also receives a switching signal for power distribution from the signal switching control unit 61. Based on the switching signal for power distribution, the transmission parameter switching unit 62 selects one of the power distributions P4-1, ..., P4-N and outputs the selected power distribution P4 to the power distribution processing unit 63. 【0233】 The power distribution P4 output from the transmission parameter switching unit 62 to the power distribution processing unit 63 is used for the signal corresponding to the transmission data SD at the timing when the power distribution processing unit 63 processes the multiplexed signal input to the power distribution processing unit 63, among the signals corresponding to the transmission data SD-1, ..., SD-N included in the multiplexed signal input to the power distribution processing unit 63. 【0234】 For example, if the power distribution P4 output from the transmission parameter switching unit 62 to the power distribution processing unit 63 is power distribution P4-1, then the power distribution processing unit 63 is at the timing to process the signal corresponding to the transmission data SD-1 included in the multiplexed signal. In this case, the power distribution processing unit 63 performs power distribution processing on the signal corresponding to the transmission data SD-1 included in the multiplexed signal using power distribution P4-1. 【0235】 The receive weight multiplication unit 42 outputs the multiplied multiplexed signal to the power distribution processing unit 63. The power distribution processing unit 63 receives the multiplied multiplexed signal from the receive weight multiplication unit 42 and also receives the power distribution P4 from the transmission parameter switching unit 62. The power distribution processing unit 63 then multiplies the signal corresponding to the transmission data SD at the current timing from the signals corresponding to the transmission data SD-1, ..., SD-N included in the input multiplexed signal by the weight indicated by the power distribution P4, thereby performing power distribution processing for each virtual transmission path of the intrinsic mode using the SVD-MIMO method, and outputs the multixed signal after power distribution processing to the demodulation unit 45. 【0236】 As mentioned above, power distribution P4 is data selected according to the power distribution switching signal output from the signal switching control unit 61. Therefore, the signal corresponding to the transmission data SD that the power distribution processing unit 63 processes at the current timing corresponds to the power distribution P4 input from the transmission parameter switching unit 62. 【0237】 The demodulation unit 45 receives the multiplexed signal after power distribution processing from the power distribution processing unit 63 and the modulation bit count P3 from the transmission parameter switching unit 44-1, and performs the aforementioned processing. Then, after processing by the time deinterleaving processing unit 46 and the error correction decoding unit 47, the multiplex separation unit 48 performs TDM-based multiplex separation on the multiplexed signal after error correction decoding and outputs the received data RD-1,...,RD-N. 【0238】 As described above, according to the receiving device 6 of Embodiment 3, the UL frame analysis unit 41 receives the UL frame reception signal R from the transmitting device 5 in the MIMO method and reads out OFDM symbols from the UL frame. The reception weight multiplication unit 42 multiplies the multiplexed signal of OFDM symbols by the reception weight RW. 【0239】 The signal switching control unit 61 generates a switching signal for power distribution, a switching signal for demodulation, a switching signal for time deinterleaving, a switching signal for error correction decoding, and a switching signal for multiplex separation, based on the amount of data or signal data input by the power distribution processing unit 63, etc. 【0240】 The transmission parameter switching units 62, 44-1, 44-2, and 44-3 select one power distribution P4 from among power distribution P4-1, ..., P4-N, one modulation bit count P3 from among modulation bit count P3-1, ..., P3-N, one time interleave length P2 from among time interleave length P2-1, ..., P2-N, and one coding rate P1 from among coding rate P1-1, ..., P1-N, respectively, based on the switching signal for power distribution, the switching signal for demodulation, the switching signal for time deinterleave, and the switching signal for error correction decoding. 【0241】 The power distribution processing unit 63 performs power distribution processing P4 on the current timing signal included in the multiplied multiplexed signal, the demodulation unit 45 performs demodulation of the current timing signal included in the multiplexed signal after power distribution processing using a predetermined modulation scheme with modulation bit count P3, and the time deinterleaving processing unit 46 performs time deinterleaving processing P2 on the time interleaving length P2 of the current timing signal included in the demodulated multiplexed signal. Then, the error correction decoding unit 47 performs error correction decoding P1 on the current timing signal included in the multiplexed signal after time deinterleaving processing. 【0242】 The multiplexing unit 48 performs TDM-based multiplexing on the multiplexed signals after error correction coding and outputs the received data RD-1, ..., RD-N. 【0243】 As a result, in an SVD-MIMO transmission system conforming to the standard of Non-Patent Document 1 mentioned above, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted simultaneously using the TDM method, the transmission timing of the transmitted data SD-1, ..., SD-N is divided in the time direction, so the power distribution processing unit 63, demodulation unit 45, time deinterleaving processing unit 46, and error correction decoding unit 47 can each be consolidated into a single system. 【0244】 Therefore, in an SVD-MIMO transmission system, when multiple signals with different combinations of transmission parameters are multiplexed and transmitted using the TDM method, the increase in circuit size can be suppressed. 【0245】 Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above embodiments and can be modified in various ways without departing from the technical concept. [Explanation of Symbols] 【0246】 1,3,5,101,106 Transmitter 2,4,6,102,107 Receiving device 10 Transmission Processing Unit 11,34,111 Error Correction Encoding Unit 12,35,112 Time Interleaving Processing Unit 13,36,113 Modulation section 14,33,116 Multiplex section 15,37,114 Transmit weight multiplication section 16,38,115 UL frame components 20 Receiving Processing Unit 21,41,121 UL Frame Analysis Unit 22,42,122 Received weight multiplication section 23,48,120 Demultiplexer 24,45,123 Demodulation section 25,46,124-hour deinterleaving processing unit 26,47,125 Error Correction and Decoding Unit 31, 43, 51, 61 Signal switching control unit 32, 44, 52, 62 Transmission parameter switching section 53,63 Power Distribution Processing Unit 103 Virtual transmission path 104 Transmitting Antenna 105 Receiving Antenna SD transmission data S transmission signal RD Received Data R Received signal P1 coding rate P2 Time Interleave Length P3 Modulation Bit Depth P4 Power Distribution SW Transmit Weight RW Receive Weight A,B,C signal

Claims

[Claim 1] In an SVD-MIMO transmission system that wirelessly transmits data from a transmitting device to a receiving device via a transmission path, the transmitting device receives multiple transmission data with different combinations of transmission parameters, including coding rate, time interleave length, modulation bit count, and transmission weight, and multiplexes and transmits the multiple transmission data. The system comprises a plurality of transmission processing units corresponding to the plurality of transmission data, as well as a multiplexing unit, a transmission weight multiplication unit, and a UL frame configuration unit. Each of the above-mentioned multiple transmission processing units is: The transmission processing unit receives the transmission data corresponding to the transmission processing unit from among the multiple transmission data, and performs error correction coding, time interleaving processing, and modulation transmission processing on the transmission data using the coding rate, time interleaving length, and modulation bit count corresponding to the transmission data, respectively, to generate the signal after the transmission processing. The aforementioned multiplexer is, Multiple transmission-processed signals generated by the multiple transmission processing units are subjected to TDM multiplexing and output as a multiplexed signal. The transmission weight multiplication unit is, The multiplexed signal output by the multiplexing unit is multiplied by the transmission weight calculated by the singular value decomposition of the channel matrix of the transmission path by the receiving device, and the multiplied multiplexed signal is output. The UL frame component is, A transmitting device characterized by arranging OFDM symbols corresponding to each of the multiple transmission data included in the multiplexed signal output by the transmission weight multiplication unit in order in the time direction to form a UL frame, and transmitting the UL frame to the receiving device. [Claim 2] In an SVD-MIMO transmission system that wirelessly transmits data from a transmitting device to a receiving device via a transmission path, the transmitting device receives multiple transmission data with different combinations of transmission parameters, including coding rate, time interleave length, modulation bit count, and transmission weight, and multiplexes and transmits the multiple transmission data. It comprises a multiplexing unit, an error correction coding transmission parameter switching unit, an error correction coding unit, a time interleaving transmission parameter switching unit, a time interleaving processing unit, a modulation transmission parameter switching unit, a modulation unit, a signal switching control unit, a transmission weight multiplication unit, and a UL frame configuration unit. The aforementioned multiplexer is, The system inputs the multiple transmission data, performs TDM multiplexing on the multiple transmission data based on the multiplexing switching signal output by the signal switching control unit, and outputs the multiplexed data. The error correction coding transmission parameter switching unit is: Multiple coding rates corresponding to the multiple transmission data are input, and based on the error correction coding switching signal output by the signal switching control unit, one coding rate is selected from the multiple coding rates and output. The error correction coding unit is The multiplexed data output by the multiplexing unit is input, and the coding rate output by the error correction coding transmission parameter switching unit is input. Error correction coding is performed on the transmission data corresponding to the coding rate among the multiple transmission data included in the multiplexed data, and the multiplexed signal after error correction coding is output. The aforementioned time interleaving transmission parameter switching unit is: Multiple time interleave lengths corresponding to the multiple transmission data are input, and based on the time interleave switching signal output by the signal switching control unit, one time interleave length is selected from the multiple time interleave lengths and output. The aforementioned time interleaving processing unit, The multiplexed signal output by the error correction coding unit is input, and the time interleaving length output by the time interleaving transmission parameter switching unit is input, and time interleaving processing is performed on the signal corresponding to the time interleaving length among the multiple signals included in the multiplexed signal, and the multiplexed signal after time interleaving processing is output. The aforementioned modulation transmission parameter switching unit is: Multiple modulation bit counts corresponding to the multiple transmission data are input, and based on the modulation switching signal output by the signal switching control unit, one modulation bit count from the multiple modulation bit counts is selected and output. The modulation unit is The multiplexed signal output by the time interleaving processing unit is input, and the modulation bit number output by the modulation transmission parameter switching unit is input, and the signal corresponding to the modulation bit number among the multiple signals included in the multiplexed signal is modulated by the modulation bit number, and the modulated multiplexed signal is output. The transmission weight multiplication unit is, The modulated multiplexed signal output by the modulation unit is multiplied by the transmission weight calculated by the singular value decomposition of the channel matrix of the transmission line by the receiving device, and the multiplied multiplexed signal is output. The UL frame component is, The OFDM symbols corresponding to each of the multiple transmission data included in the multiplexed signal output by the transmission weight multiplication unit are arranged in order in the time direction to form a UL frame, and the UL frame is transmitted to the receiving device. The signal switching control unit, The multiplexing unit generates a switching signal for multiplexing that indicates the timing of each of the multiple transmission data to be multiplexed, and outputs the switching signal for multiplexing to the multiplexing unit. The error correction coding unit generates a switching signal for error correction coding that indicates the timing of each of the multiple transmission data included in the multiplexed data that is subjected to error correction coding, and outputs the switching signal for error correction coding to the error correction coding transmission parameter switching unit. The time interleaving processing unit generates a switching signal for time interleaving that indicates the timing of each of the multiple signals included in the multiple signal that is subjected to time interleaving processing, and outputs the switching signal for time interleaving to the time interleaving transmission parameter switching unit. A transmitting device characterized by generating a modulation switching signal that indicates the timing of each of the multiple signals included in the multiplexed signal that is modulated by the modulation unit, and outputting the modulation switching signal to the modulation transmission parameter switching unit. [Claim 3] In the transmitting device according to claim 2, Furthermore, it includes a power distribution transmission parameter switching unit and a power distribution processing unit, The power distribution transmission parameter switching unit is: Multiple power distributions corresponding to the multiple transmission data are input, and based on the power distribution switching signal output by the signal switching control unit, one of the multiple power distributions is selected and output. The power distribution processing unit is, The multiplexed signal output by the modulation unit is input, and the power distribution output by the power distribution transmission parameter switching unit is input, and power distribution processing is performed for each virtual transmission path of the intrinsic mode according to the SVD-MIMO method for the signal corresponding to the power distribution among the multiple signals included in the multiplexed signal, and the multiplexed signal after power distribution processing is output. The transmission weight multiplication unit is, The multiplexed signal after the power distribution processing output by the power distribution processing unit is multiplied by the transmission weight. The signal switching control unit further, A transmitting device characterized by generating a switching signal for power distribution that indicates the timing of each of the multiple signals included in the multiple signal for which power distribution processing is performed by the power distribution processing unit, and outputting the switching signal for power distribution to the power distribution transmission parameter switching unit. [Claim 4] In an SVD-MIMO transmission system that wirelessly transmits data from a transmitting device to a receiving device via a transmission path, the receiving device receives a UL frame from the transmitting device that contains multiplexed signals of multiple transmission data with different combinations of transmission parameters including coding rate, time interleave length, modulation bit count, and transmission weight, multiplexes and separates the multiplexed signals, and outputs multiple received data corresponding to the multiple transmission data, The system comprises a UL frame analysis unit, a received weight multiplication unit, a multiplexing unit, and a plurality of receiving processing units corresponding to the plurality of received data. The UL frame analysis unit is, From the UL frame, read out the OFDM symbols corresponding to each of the multiple transmission data arranged sequentially in the time direction. The aforementioned receive weight multiplication unit is, The UL frame analysis unit reads out the multiplexed signal of the OFDM symbols, and the receiving device multiplies it by the received weight calculated by singular value decomposition of the channel matrix of the transmission line, and outputs the multiplied multiplexed signal. The aforementioned multiple separation unit is The multiplexed signal output by the receiving weight multiplication unit is subjected to TDM-style multiplexing and multiple signals are output. Each of the aforementioned plurality of receiving processing units is: A receiving device characterized by inputting a signal corresponding to the receiving processing unit from among the plurality of signals output by the multiplexing and separation unit, performing demodulation, time deinterleaving, and error correction decoding on the signal with the modulation bit count, time interleaving length, and coding rate corresponding to the transmission data of the signal, respectively, and outputting the signal after error correction decoding as the received data. [Claim 5] In an SVD-MIMO transmission system that wirelessly transmits data from a transmitting device to a receiving device via a transmission path, the receiving device receives a UL frame from the transmitting device that contains multiplexed signals of multiple transmission data with different combinations of transmission parameters including coding rate, time interleave length, modulation bit count, and transmission weight, multiplexes and separates the multiplexed signals, and outputs multiple received data corresponding to the multiple transmission data, It comprises a UL frame analysis unit, a receive weight multiplication unit, a demodulation transmission parameter switching unit, a demodulation unit, a time deinterleaving transmission parameter switching unit, a time deinterleaving processing unit, an error correction decoding transmission parameter switching unit, an error correction decoding unit, a multiplexing / decoupling unit, and a signal switching control unit. The UL frame analysis unit is, From the UL frame, read out the OFDM symbols corresponding to each of the multiple transmission data arranged sequentially in the time direction. The aforementioned receive weight multiplication unit is, The UL frame analysis unit reads out the multiplexed signal of the OFDM symbols, and the receiving device multiplies it by the received weight calculated by singular value decomposition of the channel matrix of the transmission path, and outputs the multiplied multiplexed signal. The aforementioned demodulation transmission parameter switching unit is: Multiple modulation bit counts corresponding to the multiple transmission data are input, and based on the demodulation switching signal output by the signal switching control unit, one modulation bit count from the multiple modulation bit counts is selected and output. The demodulation unit is The multiplexed signal output by the reception weight multiplication unit is input, and the number of modulation bits output by the demodulation transmission parameter switching unit is input. Modulation is performed on the signal corresponding to the number of modulation bits among the multiple signals included in the multiplexed signal, and the modulated multiplexed signal is output. The aforementioned time deinterleaving transmission parameter switching unit is: Multiple time interleave lengths corresponding to the multiple transmission data are input, and based on the switching signal for time deinterleaving output by the signal switching control unit, one time interleave length from the multiple time interleave lengths is selected and output. The aforementioned time deinterleaving processing unit is: The multiplexed signal output by the demodulation unit is input, and the time interleaving length output by the time deinterleaving transmission parameter switching unit is input, and time deinterleaving processing is performed on the signal corresponding to the time interleaving length among the multiple signals included in the multiplexed signal, and the multiplexed signal after time deinterleaving processing is output. The error correction decoding transmission parameter switching unit is: Multiple coding rates corresponding to the multiple transmission data are input, and based on the error correction decoding switching signal output by the signal switching control unit, one coding rate is selected from the multiple coding rates and output. The error correction decoding unit is, The multiplexed signal output by the time deinterleaving processing unit is input, and the coding rate output by the error correction decoding transmission parameter switching unit is input. Error correction decoding is performed on the signal corresponding to the coding rate among the multiple signals included in the multiplexed signal, and the multiplexed data after error correction decoding is output. The aforementioned multiple separation unit is The multiplexed data output by the error correction decoding unit is input, and based on the switching signal for multiplex separation output by the signal switching control unit, TDM multiplex separation is performed, and the multiple received data is output. The signal switching control unit, The demodulation unit generates a demodulation switching signal indicating the timing of each of the multiple signals included in the multiplexed signal that is demodulated, and outputs the demodulation switching signal to the demodulation transmission parameter switching unit. The time deinterleaving processing unit generates a switching signal for time interleaving that indicates the timing of each of the multiple signals included in the multiplexed signal that is subjected to time deinterleaving processing, and outputs the switching signal for time interleaving to the time deinterleaving transmission parameter switching unit. The error correction decoding unit generates an error correction decoding switching signal indicating the timing of each of the multiple signals included in the multiplexed signal that is subjected to error correction decoding, and outputs the error correction decoding switching signal to the error correction decoding transmission parameter switching unit. A receiving device characterized by generating a switching signal for multiplexing that indicates the timing of each of the multiple received data included in the multiplexed data separated by the multiplexing unit, and outputting the switching signal for multiplexing to the multiplexing unit. [Claim 6] In the receiving device according to claim 5, Furthermore, it includes a power distribution transmission parameter switching unit and a power distribution processing unit, The power distribution transmission parameter switching unit is: Multiple power distributions corresponding to the multiple transmission data are input, and based on the power distribution switching signal output by the signal switching control unit, one of the multiple power distributions is selected and output. The power distribution processing unit is, The multiplexed signal output by the receiving weight multiplication unit is input, and the power distribution output by the power distribution transmission parameter switching unit is input, and power distribution processing is performed for each virtual transmission path of the intrinsic mode according to the SVD-MIMO method for the signal corresponding to the power distribution among the multiple signals included in the multiplexed signal, and the multiplexed signal after power distribution processing is output. The demodulation unit is The multiplexed signal output by the power distribution processing unit is input, along with the number of modulation bits, modulates the signal corresponding to the number of modulation bits among the multiple signals included in the multiplexed signal by the number of modulation bits, and outputs the modulated multiplexed signal. The signal switching control unit further, A receiving device characterized by generating a switching signal for power distribution that indicates the timing of each of the multiple signals included in the multiplexed signal for which power distribution processing is performed by the power distribution processing unit, and outputting the switching signal for power distribution to the power distribution transmission parameter switching unit.

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